Idioms for partner in crime are special phrases that mean something different from what the words say on their own. People use them to make their speaking and writing more colorful, descriptive, and fun. In this guide, you will learn many popular expressions that describe close friends, trusty companions, and teammates who share adventures.
In this lesson, we’ll look at idioms that mean having a faithful companion, working closely with a friend, and sharing fun teamwork. Let’s get started and explore some of these helpful expressions.
Idioms for Partner in Crime
1. Partner in crime
Meaning: A close friend or companion who joins you in adventures, mischief, or teamwork.
For Example: My best friend and I are partners in crime when building Lego cities in the living room. / She brought her partner in crime along to help bake cookies for the bake sale.
Other Ways to Say: Close companion / Trusted teammate
2. Right-hand man
Meaning: Your most trusted and loyal helper who assists you with everything.
For Example: During our science project, my brother acted as my right-hand man. / The team captain relied on her right-hand man to organize the gear.
Other Ways to Say: Trusted helper / Chief assistant
3. Two peas in a pod
Meaning: Two friends or companions who are nearly identical in habits and always together.
For Example: My sister and her best friend love wearing matching outfits, they are like two peas in a pod. / The puppies followed each other everywhere, acting like two peas in a pod.
Other Ways to Say: Inseparable friends / Very similar pair
4. Birds of a feather
Meaning: People with similar interests, habits, or personalities who enjoy hanging out together.
For Example: Since both boys love reading comic books, they are truly birds of a feather. / The artists clicked instantly because birds of a feather flock together.
Other Ways to Say: Similar companions / Alike friends
5. Ride or die
Meaning: An extremely loyal friend who supports you through every single situation.
For Example: My best friend has been my ride or die since kindergarten. / You need a true ride or die friend when tackling difficult school projects.
Other Ways to Say: Loyal companion / Devoted friend
6. Thick as thieves
Meaning: Being extremely close friends who share secrets and spend all their time together.
For Example: After meeting at camp, the two girls became as thick as thieves. / The puppy and kitten played together all day, thick as thieves.
Other Ways to Say: Very close / Inseparable friends
7. Joined at the hip
Meaning: Friends or companions who spend every moment together without separating.
For Example: Those two classmates are joined at the hip during recess every day. / My dog and I are joined at the hip when I read on the sofa.
Other Ways to Say: Always together / Inseparable
8. Bosom buddy
Meaning: A very close, intimate, and trusted lifelong friend.
For Example: She shared all her secret stories with her bosom buddy from school. / They grew up on the same street as bosom buddies.
Other Ways to Say: Close friend / Lifelong companion
9. Sidekick
Meaning: A loyal assistant or companion who supports the main leader in adventures.
For Example: Batman always has Robin as his loyal sidekick in comic books. / My little sister loves playing the sidekick when we build blanket forts.
Other Ways to Say: Trusted helper / Companion
10. Cohort
Meaning: A companion or associate who joins you in a task or project.
For Example: He brought his study cohort over to finish the history report. / The two science partners worked as a great cohort in lab.
Other Ways to Say: Associate / Teammate
11. Accomplice
Meaning: Someone who helps another person, often in mischief or a prank.
For Example: My brother was my willing accomplice when we hid dad’s birthday present. / She needed an accomplice to help decorate the locker.
Other Ways to Say: Helper in mischief / Partner in prank
12. Fellow traveler
Meaning: Someone who shares your journey, goals, or general life path.
For Example: We met another fellow traveler heading to the same summer camp. / Finding a fellow traveler who loves reading is wonderful.
Other Ways to Say: Journey companion / Shared path friend
13. Soulmate
Meaning: A friend or companion with whom you share a deep and natural bond.
For Example: Finding someone who loves the exact same books feels like meeting a soulmate. / My dog feels like a true animal soulmate.
Other Ways to Say: Deep companion / Kindred spirit
14. Kindred spirit
Meaning: Someone who shares your thoughts, attitudes, and feelings.
For Example: My art teacher proved to be a kindred spirit who loved painting nature. / Meeting a kindred spirit at the library made my day special.
Other Ways to Say: Like-minded friend / Similar soul
15. Companion in arms
Meaning: Someone who stands beside you through difficult challenges and work.
For Example: My science partner was a true companion in arms during the tough exam prep. / We stood as companions in arms while cleaning the messy garage.
Other Ways to Say: Supportive teammate / Loyal partner
16. Best buddy
Meaning: Your favorite and most cherished friend to play with.
For Example: He invited his best buddy over to play video games on Saturday. / My dog is my best buddy when walking in the park.
Other Ways to Say: Best friend / Top pal
17. Trusted confidant
Meaning: Someone you trust completely with your deepest secrets and thoughts.
For Example: My diary and my sister act as my most trusted confidants. / You need a trusted confidant to share your creative ideas.
Other Ways to Say: Trusted keeper of secrets / Reliable friend
18. Faithful ally
Meaning: A friend who supports your goals and stands by you in competitions.
For Example: During the spelling bee, she proved to be a faithful ally. / My teammate was a faithful ally throughout the chess tournament.
Other Ways to Say: Loyal supporter / Devoted teammate
19. Closest pal
Meaning: The friend you spend the most time with and trust the most.
For Example: My closest pal helped me carry my heavy art supplies to class. / We shared snacks with our closest pals at lunch.
Other Ways to Say: Best friend / Dear companion
20. Main squeeze NOT
Meaning: A casual friendship rather than a primary romantic partner or closest buddy.
For Example: We are just casual classmates, main squeeze not in our friendship. / He is a nice acquaintance, main squeeze not.
Other Ways to Say: Casual friend / Simple acquaintance
21. Lone wolf NOT
Meaning: Preferring to work with a trusted partner rather than all alone.
For Example: Instead of being a lone wolf, he preferred working with a partner in crime. / Teamwork is better than acting like a lone wolf.
Other Ways to Say: Team player / Collaborative partner
22. Stranger NOT
Meaning: Someone who is a well-known, trusted friend rather than a total stranger.
For Example: After ten years together, my best friend is a stranger not. / We know each other well, stranger not.
Other Ways to Say: Close friend / Familiar companion
23. Trusted cohort
Meaning: A reliable associate who helps you accomplish your daily tasks.
For Example: My lab partner acted as a trusted cohort during the science experiment. / He consulted his trusted cohort before making a decision.
Other Ways to Say: Reliable partner / Trusted associate
24. Playmate
Meaning: A childhood friend who shares outdoor games and hobbies with you.
For Example: The neighbor child was my favorite playmate during summer vacation. / We shared swings and slides with our playground playmates.
Other Ways to Say: Childhood friend / Game companion
25. Study buddy
Meaning: A partner who helps you review homework and prepare for school exams.
For Example: My best friend became my study buddy for the history test. / We met at the library with our study buddies.
Other Ways to Say: Homework partner / Exam helper
26. Teammate
Meaning: Someone who works alongside you on a sports team or group project.
For Example: My soccer teammate passed me the ball for the winning goal. / Every classmate acted as a helpful teammate during the presentation.
Other Ways to Say: Fellow player / Collaborative partner
27. Co-pilot
Meaning: A companion who sits beside you and helps manage a task or trip.
For Example: My sister acted as my co-pilot while navigating our map on the road trip. / He chose me to be his co-pilot on the science project.
Other Ways to Say: Assistant driver / Helper partner
28. Partner in play
Meaning: A friend who shares fun hobbies, games, and recreational activities.
For Example: My little brother is my favorite partner in play when building forts. / We were partners in play at the amusement park.
Other Ways to Say: Playmate / Fun companion
29. Main support
Meaning: The friend or family member who helps you through every challenge.
For Example: My mother is my main support when I feel nervous about school. / He relied on his main support during the art contest.
Other Ways to Say: Primary helper / Steady backer
30. Hand and glove
Meaning: People who work together in extremely close harmony and partnership.
For Example: The two chefs worked together hand and glove to prep the dinner. / My lab partner and I operated hand and glove on the experiment.
Other Ways to Say: Closely aligned / Perfect partnership
31. Two of a kind
Meaning: Two people who share very similar personalities and traits.
For Example: Since both of us love drawing comic books, we are truly two of a kind. / The teachers joked that we are two of a kind.
Other Ways to Say: Similar pair / Alike individuals
32. Cut from the same cloth
Meaning: Having identical personalities, values, or friendship traits.
For Example: Both brothers love building robots, they are cut from the same cloth. / You and your best friend are cut from the same cloth.
Other Ways to Say: Very similar / Identical nature
33. Matched pair
Meaning: Two friends who complement each other perfectly in teamwork.
For Example: On the tennis court, the doubles players were a perfectly matched pair. / The duo worked as a matched pair on chores.
Other Ways to Say: Balanced team / Perfect duo
34. Dynamic duo
Meaning: An energetic and highly successful pair of partners working together.
For Example: The two detectives in the story solved mysteries as a dynamic duo. / My friend and I won the trivia contest as a dynamic duo.
Other Ways to Say: Successful pair / Powerful team
35. Power couple of friendship
Meaning: A humorous way to describe two friends who achieve amazing things together.
For Example: Winning every school art prize made them the power couple of friendship. / The two organizers were the power couple of friendship at the club.
Other Ways to Say: Amazing friends / Successful duo
36. Close knit
Meaning: A group of companions or partners who care for each other deeply.
For Example: Our art club is a very close knit group of friends. / They maintain a close knit bond despite moving to different towns.
Other Ways to Say: Tight group / Closely connected
37. Besties
Meaning: A modern, casual term for your absolute best friends.
For Example: My besties and I planned a fun weekend picnic in the park. / She took a photo with her besties after the school play.
Other Ways to Say: Best friends / Dear pals
38. Chums
Meaning: An old-fashioned, friendly term for close companions and pals.
For Example: The old chums sat on the park bench sharing stories of school. / He went fishing with his school chums on Saturday.
Other Ways to Say: Friends / Pals
39. Mates
Meaning: A friendly word used to describe companions and fellow workers.
For Example: The soccer players cheered for their mates after scoring a goal. / We shared lunch with our cabin mates at camp.
Other Ways to Say: Friends / Companions
40. Companions
Meaning: People who spend time together sharing adventures and daily life.
For Example: The hikers were pleasant companions along the mountain trail. / My dogs are faithful companions during evening walks.
Other Ways to Say: Friends / Fellow travelers
41. Amigos
Meaning: A friendly Spanish term often used for close companions and pals.
For Example: The group of amigos cheered loudly when the game started. / We greeted our amigos at the birthday party.
Other Ways to Say: Friends / Pals
42. Homeboys
Meaning: Friends from your hometown or neighborhood who stick together.
For Example: He grew up playing basketball with his neighborhood homeboys. / The old friends remained close homeboys through college.
Other Ways to Say: Neighborhood pals / Hometown friends
43. Cronies
Meaning: Close companions, often spending lots of time together in leisure.
For Example: The retired neighbors sat as cronies discussing garden tips. / He met his old cronies at the diner for breakfast.
Other Ways to Say: Close pals / Companions
44. Confidantes
Meaning: Female friends whom you trust with your most private thoughts.
For Example: She shared her diary entries with her closest female confidantes. / The two sisters acted as each other’s confidantes.
Other Ways to Say: Trusted friends / Secret keepers
45. Accomplices in art
Meaning: Partners who team up to create creative projects together.
For Example: We were accomplices in art when painting the giant school mural. / The two friends acted as accomplices in art for the contest.
Other Ways to Say: Creative partners / Art teammates
46. Co-conspirators in fun
Meaning: Friends who team up to plan surprises, parties, or joyful mischief.
For Example: We were co-conspirators in fun while planning the surprise party. / My sister was my co-conspirator in fun for the prank.
Other Ways to Say: Fun partners / Playful helpers
47. Brothers in arms
Meaning: Soldiers or close companions who fight through challenges together.
For Example: The teammates felt like brothers in arms after winning the tournament. / Facing tough exams made us feel like brothers in arms.
Other Ways to Say: Devoted comrades / Loyal teammates
48. Sisters in spirit
Meaning: Female friends who share a deep emotional connection and bond.
For Example: Even though they lived in different states, they were sisters in spirit. / The two poets felt like sisters in spirit.
Other Ways to Say: Spiritual sisters / Close companions
49. Joined at the heart
Meaning: Friends who love and care for each other with deep emotional ties.
For Example: Best friends often feel joined at the heart despite distance. / The loyal pets were joined at the heart.
Other Ways to Say: Deeply connected / Loving friends
50. Tied at the hip NOT
Meaning: Having independent hobbies while remaining great friends.
For Example: Although they had different classes, tied at the hip not, they stayed pals. / Being independent meant they were tied at the hip not.
Other Ways to Say: Independent friends / Separate hobbies
51. Second half
Meaning: A companion or partner who completes your team or duo.
For Example: She found her second half for the science project in chemistry class. / He looked for his tennis second half for the tournament.
Other Ways to Say: Partner / Teammate
52. Partner in success
Meaning: A friend or colleague who shares the joy of achieving a goal.
For Example: My lab partner was my true partner in success for the science fair. / We celebrated as partners in success after winning the match.
Other Ways to Say: Achievement partner / Winning teammate
53. Loyal shadow
Meaning: A companion who follows you closely and supports you everywhere.
For Example: My little puppy followed me around like a loyal shadow all day. / He acted as my loyal shadow during the museum tour.
Other Ways to Say: Faithful follower / Devoted companion
54. Trusted escort
Meaning: A companion who walks with you to ensure safety and company.
For Example: My older brother acted as a trusted escort to the evening event. / She provided a trusted escort through the dark hallway.
Other Ways to Say: Safe companion / Guide
55. Friendly presence
Meaning: A companion whose mere company brings comfort and happiness.
For Example: Having my cat nearby provided a comforting, friendly presence while studying. / Her friendly presence made the long trip enjoyable.
Other Ways to Say: Comforting company / Pleasant friend
56. Constant companion
Meaning: Someone who stays by your side through every daily activity.
For Example: My dictionary was my constant companion while writing essays. / The dog remained her constant companion during walks.
Other Ways to Say: Everyday friend / Faithful partner
57. True blue friend
Meaning: A friend who is completely honest, loyal, and dependable.
For Example: You can always count on a true blue friend when you need help. / She proved she was a true blue friend during hard times.
Other Ways to Say: Loyal friend / Dependable pal
58. Rock solid ally
Meaning: A partner whose support never wavers during stressful moments.
For Example: My debate partner was a rock solid ally during competition. / He proved to be a rock solid ally when chores piled up.
Other Ways to Say: Dependable helper / Steady teammate
59. Trusted cohort in mischief
Meaning: A playful partner who joins you in harmless jokes and fun.
For Example: He was my trusted cohort in mischief when we scared our friends with masks. / She acted as a trusted cohort in mischief during recess.
Other Ways to Say: Playful partner / Prank helper
60. Ultimate companion
Meaning: The absolute best friend and partner you could ever ask for.
For Example: My golden retriever proved to be the ultimate companion for hiking. / Finding a true best friend makes them your ultimate companion.
Other Ways to Say: Best friend / Supreme partner
Exercise to Practice
- My best friend and I are partners in ________ when building Lego cities in the living room.
- During our science project, my brother acted as my right-hand ________.
- My sister and her best friend love wearing matching outfits, they are like two peas in a ________.
- Since both boys love reading comic books, they are truly birds of a ________.
- My best friend has been my ride or ________ since kindergarten.
- After meeting at camp, the two girls became as thick as ________.
- Those two classmates are joined at the ________ during recess every day.
- She shared all her secret stories with her bosom ________ from school.
- Batman always has Robin as his loyal ________ in comic books.
- He brought his study ________ over to finish the history report.
- My brother was my willing ________ when we hid dad’s birthday present.
- Finding someone who loves the exact same books feels like meeting a ________.
- My art teacher proved to be a ________ spirit who loved painting nature.
- He invited his best ________ over to play video games on Saturday.
- My diary and my sister act as my most trusted ________.
Answer Key
- crime
- man
- pod
- feather
- die
- thieves
- hip
- buddy
- sidekick
- cohort
- accomplice
- soulmate
- kindred
- buddy
- confidants
Conclusion
Learning idioms for partner in crime is a wonderful way to expand your vocabulary and describe close friendships in creative ways. These expressive phrases help make your everyday speaking, storytelling, and writing far more colorful, descriptive, and fun.
Try using a few of these helpful idioms the next time you write a story about best friends or talk about your favorite teammate. Incorporating these fun expressions into your daily language will boost your communication skills and help your writing shine!
