Sisters share a bond that’s unlike any other — built on love, laughter, and a lifetime of memories.
Whether it’s childhood secrets or being each other’s biggest supporter, the relationship between sisters is a mix of friendship, family, and forever loyalty.
These idioms reflect how sisters stand by each other through every joy and challenge, expressing affection, trust, and shared identity in simple yet meaningful phrases.
1. Thick as thieves
Meaning: Extremely close and loyal; sharing secrets and trust.
Usage:
My sister and I are thick as thieves — we’ve never kept a secret from each other.
Even as adults, we’re still thick as thieves and talk every single day.
2. Joined at the hip
Meaning: Inseparable; always together.
Usage:
When we were kids, we were joined at the hip — you’d never see one without the other.
People joke that my sister and I are joined at the hip because we do everything together.
3. Two peas in a pod
Meaning: Very similar in looks, behavior, or interests.
Usage:
My sister and I are like two peas in a pod — we even finish each other’s sentences.
They say we look alike, think alike, and act alike — truly two peas in a pod.
4. Through thick and thin
Meaning: Supporting each other no matter the situation or hardship.
Usage:
My sister stood by me through thick and thin, even when times were rough.
We’ve seen each other at our best and worst — that’s true sisterhood through thick and thin.
5. Blood is thicker than water
Meaning: Family bonds are stronger than friendships or other relationships.
Usage:
We may argue sometimes, but blood is thicker than water — she’ll always be my sister.
I can count on her when it matters most because blood is thicker than water.
6. Cut from the same cloth
Meaning: Having similar personalities, habits, or values.
Usage:
My sister and I are cut from the same cloth — we both love helping others.
You can tell we’re related; our sense of humor proves we’re cut from the same cloth.
7. Shoulder to lean on
Meaning: Someone who provides emotional support and comfort.
Usage:
Whenever I’m down, my sister is my shoulder to lean on.
She’s always been there for me — my true shoulder to lean on in tough times.
8. Built-in best friend
Meaning: A sister who’s also your closest friend.
Usage:
I don’t need to look far for a best friend — I was born with one.
Having a sister means having a built-in best friend for life.
9. Soul sister
Meaning: A sister or close female friend with whom you share a deep emotional bond.
Usage:
My sister is my soul sister — she understands me without words.
We’ve always been spiritually connected; she’s my true soul sister.
10. My ride or die
Meaning: Someone who will stay by your side no matter what happens.
Usage:
My sister’s my ride or die — always loyal, always there.
No matter how crazy life gets, she’s my ride or die till the end.
11. Birds of a feather
Meaning: People who are alike in character or interests often stay close together.
Usage:
We’ve always been birds of a feather, sharing the same taste in music and fashion.
Everyone says we’re birds of a feather because we both love helping people.
12. Heart and soul
Meaning: To love someone deeply and completely.
Usage:
My sister is my heart and soul; I can’t imagine life without her.
She puts her heart and soul into everything she does for her family.
13. Like mother, like daughter
Meaning: Daughters often resemble their mothers in character or behavior.
Usage:
My sister and I both take after Mom — like mother, like daughter.
We’re both strong-willed and independent; like mother, like daughter really fits us.
14. Under someone’s wing
Meaning: To protect, guide, or care for someone lovingly.
Usage:
When I was little, my sister took me under her wing.
She’s always had me under her wing, watching out for me every step of the way.
15. The apple of my eye
Meaning: Someone you love deeply and cherish.
Usage:
My little sister has always been the apple of my eye.
No matter how old she gets, she’ll always be the apple of my eye.
16. Hand in glove
Meaning: Working together perfectly or in complete harmony.
Usage:
We run our small business hand in glove, always understanding each other.
As sisters, we work hand in glove — no one else gets me the way she does.
17. Shoulder to cry on
Meaning: Someone who offers comfort and listens during sad times.
Usage:
Whenever life gets hard, my sister is my shoulder to cry on.
I’m grateful she’s always there as a shoulder to cry on when things fall apart.
18. In her corner
Meaning: Supporting someone completely, no matter what happens.
Usage:
Even when I mess up, my sister is always in my corner.
I know she’ll always be in my corner, cheering me on.
19. Close-knit
Meaning: Describes a family or group with very strong, loving relationships.
Usage:
Our family is so close-knit, especially my sister and me.
We’ve stayed close-knit through every challenge life has thrown our way.
20. Match made in heaven
Meaning: A perfect pairing or relationship that works beautifully.
Usage:
We’re a match made in heaven when it comes to planning events together.
People say our bond is a match made in heaven — we just understand each other.
21. Hold a special place in my heart
Meaning: To be loved and cherished deeply.
Usage:
My sister will always hold a special place in my heart.
Even when we’re miles apart, she holds a special place in my heart.
