Want to describe that one person who joins you in every fun,chaotic, sneaky or mischievous act? That special person who supports you like a partner in crime? You’re in the right place.
These idioms are perfect for friendships, relationships, siblings — anyone who stands with you through fun and trouble.
Let’s explore 20 popular idioms for partner in crime, explained simply with meanings, example sentences, common mistakes & usage notes.
1. Partner in Crime
Word-by-word meaning: A person who commits crimes with you.
Idiomatic meaning: A close friend who joins you in mischievous or fun activities.
Example sentences:
- Ali is my partner in crime — we do everything together.
- She’s my partner in crime for late-night food cravings.
Common error: People think it means actual criminal activity.
Usage note: Use casually for fun, not real illegal acts.
2. Two Peas in a Pod
Word-by-word meaning: Two peas inside one pod.
Idiomatic meaning: Two people extremely similar and always together.
Example sentences:
- Those twins are like two peas in a pod.
- We think alike — like two peas in a pod.
Common error: Saying “two beans in a pod.”
Usage note: Best for close friends or couples.
3. Partners in Mischief
Word-by-word meaning: People who create mischief together.
Idiomatic meaning: Friends who love pranks or playful trouble.
Example sentences:
- We were partners in mischief during school.
- She and I are partners in mischief at work.
Common error: Replacing with “partners for mischief.”
Usage note: More playful than “partner in crime.”
4. Birds of a Feather
Word-by-word meaning: Birds with similar feathers flock together.
Idiomatic meaning: People with similar interests naturally stick together.
Example sentences:
- We instantly clicked — birds of a feather!
- Trouble-makers are birds of a feather.
Common error: Saying “birds with feathers.”
Usage note: Often followed by flock together.
5. Thick as Thieves
Word-by-word meaning: Close together like thieves planning.
Idiomatic meaning: Very close and secretive friends.
Example sentences:
- We became thick as thieves last year.
- Those two are thick as thieves — always whispering.
Common error: “Thick like thieves” (wrong).
Usage note: Implies strong trust + confidentiality.
6. Joined at the Hip
Word-by-word meaning: Physically attached.
Idiomatic meaning: Always together, inseparable.
Example sentences:
- They’re joined at the hip since childhood.
- Me and Sara are joined at the hip — always together.
Common error: Adding with.
Usage note: Use for extremely close bonds.
7. Bonnie and Clyde
Word-by-word meaning: Famous criminal couple.
Idiomatic meaning: A fearless couple/team doing everything together.
Example sentences:
- My Bonnie-and-Clyde buddy in adventures!
- They’re like Bonnie and Clyde in fun.
Common error: Only using for romance.
Usage note: Works for friendships too.
8. My Ride or Die
Word-by-word meaning: Someone who stays whether riding or dying.
Idiomatic meaning: Loyal friend who sticks through good and bad.
Example sentences:
- She’s my true ride or die.
- A best friend who stands — ride or die.
Common error: Spelling “ride and die”.
Usage note: Very trending phrase.
9. Dynamic Duo
Word-by-word meaning: Powerful pair.
Idiomatic meaning: Two people who work amazingly together.
Example sentences:
- We make a dynamic duo at work tasks.
- Batman and Robin — iconic dynamic duo.
Common error: “Dynamic pair” loses idiomatic charm.
Usage note: Great for best friends/team mates.
10. My Day One
Word-by-word meaning: From day one of life/journey.
Idiomatic meaning: A very old and loyal friend.
Example sentences:
- He’s my day one — always there.
- We’ve been together since school, my day one.
Common error: Writing day 1 friend literally.
Usage note: Best for long-term bonds.
11. Ride Together, Die Together
Word-by-word meaning: Together in both situations.
Idiomatic meaning: Deep loyalty and support.
Example sentences:
- Best friends — ride together, die together!
- We face everything as one.
Common error: Reversing order.
Usage note: Strong emotional tone.
12. Crime Buddy
Word-by-word meaning: Buddy in crime.
Idiomatic meaning: Someone who joins in fun schemes.
Example sentences:
- My crime buddy for late-night trips.
- He’s my crime buddy since college.
Common error: Using in formal writing.
Usage note: Very casual, humorous.
13. Wingman / Wingwoman
Word-by-word meaning: The one who supports.
Idiomatic meaning: Someone who assists you socially.
Example sentences:
- She’s my wingwoman at parties.
- Be my wingman today!
Common error: Saying wing person.
Usage note: Used socially or dating contexts.
14. My Go-To Person
Word-by-word meaning: First person I go to.
Idiomatic meaning: Trusted helper or advisor.
Example sentences:
- She’s my go-to person for secrets.
- He’s my go-to when trouble hits.
Common error: Adding “always”.
Usage note: Used for reliability.
15. Bestie for Life
Word-by-word meaning: Best friend forever.
Idiomatic meaning: Lifelong close friend.
Example sentences:
- My bestie for life — my other half.
- We’ve survived everything — bestie for life.
Common error: “Besty” spelling error.
Usage note: Informal & affectionate.
16. Soul Sister / Soul Brother
Word-by-word meaning: Friend like a sibling of the soul.
Idiomatic meaning: Deep connection like family.
Example sentences:
- She’s my soul sister — not by blood.
- He’s a soul brother I never had.
Common error: “Soul friend.”
Usage note: Shows emotional closeness.
17. Peanut Butter and Jelly
Word-by-word meaning: Two foods that pair perfectly.
Idiomatic meaning: Two people perfectly compatible.
Example sentences:
- We click like peanut butter and jelly.
- They’re PB&J — perfect pair.
Common error: Confusing with literal food.
Usage note: Fun & humorous.
18. A Team of Two
Word-by-word meaning: Team consisting of two.
Idiomatic meaning: Strong pair working together.
Example sentences:
- When we team up, it’s a team of two power!
- A team of two beats the rest.
Common error: “Two-team” wrong.
Usage note: Good for productivity context.
19. My Crime Partner
Word-by-word meaning: Partner in wrongdoing.
Idiomatic meaning: Someone who loves goofy chaos with you.
Example sentences:
- Movie night? My crime partner joins.
- Childhood crime partner forever.
Common error: Use carefully to avoid literal meaning.
Usage note: Humorous, playful.
20. My Other Half
Word-by-word meaning: Half of me.
Idiomatic meaning: Someone who completes you emotionally.
Example sentences:
- She’s my other half — we balance each other.
- My other half in laughter and trouble.
Common error: “Better half” is slightly different.
Usage note: More romantic, but can be friendly too.
FAQs
1. What does partner in crime mean?
It refers to someone who joins you in fun, mischief or adventures — not real crime.
2. Are these idioms formal or casual?
Most are casual and used in speech, captions, messages, friendly conversations.
3. Can partner in crime be used for couples?
Yes! Works for friendships, siblings, and romantic partners.
4. Which idiom shows deep loyalty?
Ride or die, my day one, thick as thieves show deep trust and loyalty.
5. Which idiom suits best friends most?
Partner in crime, dynamic duo, bestie for life, two peas in a pod.
Conclusion
Next time you want to describe your closest buddy — the one who joins your adventures, secrets, late-night plans & mischief — use these idioms for partner in crime to sound more natural and expressive.
Try using 3 idioms today in chat or captions — it’s the easiest way to remember them!
Anita Brookner, author at SeekIdiom, shares easy explanations of English idioms with examples to help learners expand vocabulary and speak more confidently.
