25 Friendship Idioms That Nail Every Type of Bestie

Because friendships deserve their own silly, sparkly, snack‑sharing language.

Kids don’t just have friends — they form tiny, unstoppable duos, trios, and chaos‑clusters with their own inside jokes, secret handshakes, and “we met five minutes ago but now we’re siblings” energy.

And over the years, we’ve collected a whole bunch of idioms to describe these legendary friendships. Some are old, some are new, and some are so accurate it’s almost suspicious.

Here are 25 friendship idioms explained with maximum fun.

1. Peas in a pod

Basically twins, but with different parents.

2. Thick as thieves

The duo whispering in the corner and definitely planning something.

3. Joined at the hip

If you see one, the other is literally right behind them.

4. Birds of a feather flock together

Same vibe. Same energy. Same questionable decisions.

5. Partners in crime

The friends who turn “clean up time” into a heist movie.

6. Through thick and thin

Ride‑or‑die, even when someone loses the last fruit snack.

7. A shoulder to cry on

The friend who hands you a tissue AND a snack.

8. Two heads are better than one

Especially when building a fort or solving a mystery.

9. In the same boat

Both forgot their homework. Both panicking. Bonded forever.

10. Like family

The friend who raids your pantry without asking.

11. My other half

The friend who finishes your sentences and steals your fries.

12. Salt and pepper

Different flavors, perfect combo.

13. Best of both worlds

One has the ideas. One has the snacks. Together? Unstoppable.

14. Joined at the laugh

The duo who can’t stop giggling — even when they’re supposed to.

15. My right‑hand person

The friend you trust with scissors, glue, and your secrets.

16. Thick as glue

Stuck together. Forever. Good luck separating them.

17. Stick like glue

Same idea — friendship super‑glue mode activated.

18. My rock

The friend who stays calm when everyone else is melting down.

19. My sunshine

Instant mood‑booster. Human happy‑light.

20. My buddy

Classic. Simple. Perfect.

21. My pal

Same energy as “buddy,” but with extra charm.

22. My sidekick

The friend who’s always ready for the next adventure.

23. My partner

Short for “partner in crime,” long for “we’re a team.”

24. My BFF

The forever friend. The bracelet‑worthy one.

25. My day‑one

The friend who’s been around since snack‑time days.

Wrapping It Up 

Friendship idioms are basically tiny poems about the people who make life brighter, sillier, and way more fun. Whether your kid is a “pea in a pod,” a “partner in crime,” or someone’s “sunshine,” these phrases capture the magic of growing up with a buddy who turns ordinary days into legendary ones.

💡 Filling out your bestie’s My Friends and I book? Drop your bestie‑name in the Nickname field. That’s where all the “only‑my‑bestie‑calls‑me‑this” names go.