Top 49 Slang For Sister – Meaning & Usage

Sisters, they are the ones who have been there through thick and thin, sharing secrets, laughter, and maybe even a few sibling squabbles. Whether you have a sister yourself or you’re just fascinated by the special bond they share, we’ve got you covered with this list of the top slang words and phrases used to refer to sisters. From affectionate nicknames to hilarious slang terms, you’ll find it all here. Get ready to dive into the world of sisterhood and discover some fun and catchy ways to talk about your favorite sibling!

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1. Sis

This is a shortened and informal term for “sister.” It is commonly used among siblings or close friends.

For example, “Hey sis, can I borrow your shirt?”
A person might say, “I love spending time with my sis, she’s my best friend.”
In a playful tone, someone might tease their sister by saying, “Sis, you’re always hogging the bathroom!”

2. Sista

This is an alternative spelling of “sister” that is often used in African American Vernacular English (AAVE) or hip-hop culture.

For instance, “Hey sista, can you pass me the remote?”
A person might say, “My sista always knows how to make me laugh.”
In a song lyric, an artist might say, “I’m here to represent for all my sistas out there.”

3. Big sis

This term is used to refer to an older sister. It can be used to show respect or affection for an older sibling.

For example, “I look up to my big sis, she’s always been there for me.”
A person might say, “My big sis is my role model, she’s accomplished so much.”
In a conversation about family dynamics, someone might say, “As the big sis, I always feel responsible for looking out for my younger siblings.”

4. Little sis

This term is used to refer to a younger sister. It can be used to show affection or a sense of protectiveness towards a younger sibling.

For instance, “I always try to be a good role model for my little sis.”
A person might say, “My little sis is so talented, she’s going to achieve great things.”
In a playful tone, someone might tease their younger sister by saying, “Watch out, little sis, I’m always one step ahead!”

5. Sister from another mister

This phrase is used to describe a female friend who is like a sister, even though there is no blood relation. It emphasizes the strong bond and connection between two friends.

For example, “She’s not my biological sister, but she’s my sister from another mister.”
A person might say, “I can always count on my sister from another mister for support and advice.”
In a social media post, someone might share a picture with their close friend and caption it, “Having a sister from another mister means always having a partner in crime.”

6. Sis-in-law

This term refers to the sister of one’s spouse or the spouse of one’s sibling. It is commonly used to refer to the sister of one’s partner.

For example, “I’m going to visit my sis-in-law this weekend.”
In a family gathering, one might introduce their sister-in-law by saying, “This is my sis-in-law, Sarah.”
A person might say, “I have a great relationship with my sis-in-law. We’re like sisters ourselves.”

7. Bestie sister

This term is used to refer to a sister who is also one’s best friend. It signifies a close bond and a strong friendship between siblings.

For instance, “My sister is not just my sibling, she’s my bestie sister.”
In a conversation about their relationship, one might say, “My sister is my bestie sister. We do everything together.”
A person might post a photo with their sister on social media with the caption, “Celebrating my bestie sister’s birthday! Love you to the moon and back.”

8. Secret keeper

This term describes a sister who is trusted to keep secrets and confidential information. It signifies the trust and reliability between siblings.

For example, “My sister is my secret keeper. I can trust her with anything.”
In a discussion about family dynamics, one might say, “Every family needs a secret keeper, and my sister plays that role.”
A person might share a funny story about their sister on a social media post, saying, “My sister is not just my sibling, she’s also my secret keeper. She knows all my embarrassing moments!”

9. Genesister

This term is a play on words, combining “gene” and “sister” to emphasize the biological connection between siblings. It refers to a sister who shares the same genetic lineage.

For instance, “My genesister and I have so much in common.”
In a conversation about family resemblance, one might say, “You can definitely see the family traits in my genesister and me.”
A person might post a throwback photo with their genesister on social media, captioning it, “Throwback to the good old days with my genesister. Love you, sis!”

10. Kinswoman

This term is a formal and respectful way to refer to a female family member, specifically a sister. It acknowledges the familial relationship and emphasizes the kinship bond.

For example, “My kinswoman is my pillar of support.”
In a discussion about family values, one might say, “Respecting and cherishing our kinswomen is important.”
A person might dedicate a heartfelt message to their kinswoman on a special occasion, saying, “To my beloved kinswoman, thank you for always being there for me. You mean the world to me.”

11. Sissy

This is a playful and affectionate term used to refer to one’s sister. It can also be used to tease or mock a sister in a lighthearted way.

For example, “Hey sissy, want to go shopping with me?”
A sibling might say, “Don’t be such a sissy, let’s go on the roller coaster!”
In a joking manner, someone might say, “My sissy always steals my clothes!”

12. Sibs

This is a casual and convenient way to refer to both sisters and brothers. It is often used when talking about multiple siblings at once.

For instance, “I’m going to visit my sibs this weekend.”
A person might post a picture with their siblings and caption it, “Love my sibs!”
In a conversation about family, someone might ask, “How many sibs do you have?”

13. Sissykins

This is an endearing and cute nickname for a sister. It adds a playful and affectionate tone to the relationship.

For example, “Goodnight, sissykins. Sweet dreams!”
A sibling might say, “You’re my favorite sissykins in the whole world.”
In a teasing manner, someone might say, “Aw, look at little sissykins throwing a tantrum!”

14. Sissyboo

This is a cute and affectionate term used to refer to a sister. It conveys a sense of love and closeness in the sibling relationship.

For instance, “Come here, sissyboo. I want to give you a hug.”
A sibling might say, “I miss my sissyboo. Can’t wait to see her again.”
In a playful manner, someone might say, “Who’s the best sissyboo in the world? You are!”

15. Sislet

This is a sweet and gentle nickname for a sister. It conveys a sense of care and protectiveness towards the sister.

For example, “Are you okay, sislet? You seem upset.”
A sibling might say, “I’ll always be here for you, sislet.”
In a loving manner, someone might say, “My little sislet is growing up so fast!”

16. Sisso

Sisso is a casual slang term for sister. It is often used as a term of endearment or familiarity between siblings or close friends.

For example, “Hey sisso, can you help me with this?”
Two sisters might greet each other with, “What’s up, sisso?”
When teasing a sister, someone might say, “You’re my favorite sisso, even if you annoy me sometimes.”

17. Sistren

Sistren is a term derived from Rastafarian culture that refers to a group of sisters. It is used to emphasize a sense of unity and solidarity among women.

For instance, “All the sistren in the community came together to support each other.”
A group of close female friends might refer to themselves as “sistren.”
When discussing the importance of sisterhood, someone might say, “We need to uplift and empower our sistren.”

18. Sisaroo

Sisaroo is a playful and affectionate slang term for sister. It is often used in a lighthearted or teasing manner between siblings or close friends.

For example, “Hey sisaroo, want to go grab some ice cream?”
Two sisters might playfully call each other “sisaroo” when joking around.
When expressing love and affection for a sister, someone might say, “I’m so grateful to have you as my sisaroo.”

19. Sistah

Sistah is a slang term for sister that is commonly used in African American Vernacular English (AAVE) and urban communities. It is often used as a term of endearment or camaraderie among women.

For instance, “Hey sistah, how’s it going?”
A group of close female friends might refer to themselves as “sistahs.”
When expressing support and solidarity with other women, someone might say, “We’re all in this together, sistahs.”

20. Sis-mate

Sis-mate is a slang term that combines “sis” (short for sister) and “mate” (a colloquial term for friend or companion). It is used to refer to a close female friend or someone who is like a sister.

For example, “She’s not just my best friend, she’s my sis-mate.”
Two friends who have a sister-like bond might refer to each other as “sis-mates.”
When expressing gratitude for a friend who feels like family, someone might say, “I’m so lucky to have you as my sis-mate.”

21. Sis-pal

This term is used to refer to a sister who is also a close friend. It emphasizes the strong bond and friendship between siblings.

For example, “My sis-pal and I are inseparable. We do everything together.”
In a conversation about sibling relationships, someone might say, “Having a sis-pal is like having a built-in best friend.”
A person might introduce their sister by saying, “This is my sis-pal, we’ve been best friends since childhood.”

22. Sis-bud

Similar to “sis-pal,” this term is used to describe a sister who is also a close companion or buddy. It highlights the camaraderie and friendship between siblings.

For instance, “My sis-bud and I have each other’s backs no matter what.”
In a discussion about sibling dynamics, someone might say, “Having a sis-bud means always having someone to rely on.”
A person might introduce their sister by saying, “This is my sis-bud, we’ve been through thick and thin together.”

23. Sis-kin

This term refers to a sister who is not only a family member but also a close confidant and supporter. It emphasizes the familial bond and connection between siblings.

For example, “My sis-kin is my rock. She’s always there for me.”
In a conversation about sibling relationships, someone might say, “Having a sis-kin means having someone who understands you like no one else.”
A person might express gratitude for their sister by saying, “I’m so lucky to have such an amazing sis-kin.”

24. Sis-chick

This term is used to describe a sister who is not only a sibling but also a cool and stylish woman. It highlights the sister’s fashionable and trendy qualities.

For instance, “My sis-chick always knows the latest fashion trends.”
In a discussion about sibling dynamics, someone might say, “Having a sis-chick as a sister means always having a fashion advisor.”
A person might compliment their sister by saying, “You’re such a stylish sis-chick!”

25. Sis-babe

Similar to “sis-chick,” this term is used to describe a sister who is not only a sibling but also an attractive and confident woman. It emphasizes the sister’s beauty and allure.

For example, “My sis-babe is always turning heads wherever she goes.”
In a conversation about sibling relationships, someone might say, “Having a sis-babe as a sister means having a role model for confidence.”
A person might compliment their sister by saying, “You’re such a stunning sis-babe!”

26. Sis-gal

This term is a combination of “sis” (short for sister) and “gal” (a casual term for a girl). It is used to refer to a female sibling or a close female friend.

For example, “Hey sis-gal, want to grab some coffee?”
A person might say, “My sis-gal is my best friend.”
Another might introduce their sister by saying, “This is my sis-gal, Sarah.”

27. Sis-lady

Similar to “sis-gal,” this term combines “sis” and “lady” to refer to a female sibling or a close female friend. It is a more formal version of “sis-gal.”

For instance, “I’m going shopping with my sis-lady.”
A person might say, “My sis-lady always gives the best advice.”
Another might say, “I’m proud to call her my sis-lady.”

28. Sis-miss

This term combines “sis” and “miss” to refer to a female sibling or a close female friend. It is a playful and affectionate way to address someone.

For example, “Hey sis-miss, how was your day?”
A person might say, “My sis-miss is always there for me.”
Another might say, “I love spending time with my sis-miss.”

29. Sis-doll

Similar to “sis-miss,” this term combines “sis” and “doll” to refer to a female sibling or a close female friend. It is a term of endearment and implies a strong bond.

For instance, “I’m going to the movies with my sis-doll.”
A person might say, “My sis-doll is the most caring person I know.”
Another might say, “I’m lucky to have such a supportive sis-doll.”

30. Sis-queen

This term combines “sis” and “queen” to refer to a female sibling or a close female friend who is confident, strong, and influential. It is a term of admiration and respect.

For example, “My sis-queen always knows how to handle any situation.”
A person might say, “I look up to my sis-queen for guidance.”
Another might say, “She’s the queen of our family, my sis-queen.”

31. Sis-darling

This slang is used to affectionately refer to a sister in a sweet and loving way.

For example, “Hey sis-darling, can I borrow your dress for the party?”
A person might say, “I love spending time with my sis-darling, she’s the best.”
When introducing her sister to a friend, someone might say, “This is my sis-darling, she’s always there for me.”

32. Sis-sweetie

This slang is used to express fondness and affection towards a sister.

For instance, “How are you doing today, sis-sweetie?”
A person might say, “My sis-sweetie always knows how to make me feel better.”
When talking about a sister’s kindness, someone might say, “She’s such a sis-sweetie, always looking out for others.”

33. Sis-honey

This slang is used to show affection and closeness towards a sister.

For example, “I missed you, sis-honey!”
A person might say, “I love going shopping with my sis-honey, she has great fashion sense.”
When expressing gratitude, someone might say, “Thanks for helping me out, sis-honey.”

34. Sis-love

This slang is used to convey love and affection towards a sister.

For instance, “I’ll always be here for you, sis-love.”
A person might say, “I’m proud of my sis-love, she’s achieved so much.”
When reminiscing about childhood memories, someone might say, “Me and my sis-love used to have so much fun together.”

35. Sis-heart

This slang is used to express love and closeness towards a sister.

For example, “You’re my rock, sis-heart.”
A person might say, “I can always count on my sis-heart for support.”
When talking about a sister’s caring nature, someone might say, “She’s such a sis-heart, always looking out for others.”

36. Sis-soul

This term is used to describe a sister who has a kind and loving nature. It emphasizes the deep connection and bond between siblings.

For example, “My sis-soul always knows how to make me feel better when I’m down.”
A person might say, “I’m lucky to have a sis-soul like her in my life.”
Another might express, “She’s not just my sister, she’s my sis-soul.”

37. Sis-spirit

This slang term refers to a sister who is resilient, determined, and has a strong sense of self. It highlights her inner strength and ability to overcome challenges.

For instance, “My sis-spirit never gives up and always fights for what she believes in.”
A person might say, “She’s the embodiment of sis-spirit – nothing can bring her down.”
Another might admire, “Her sis-spirit is contagious and inspires everyone around her.”

38. Sis-light

This term is used to describe a sister who brings joy, happiness, and positivity into your life. It emphasizes her ability to brighten up any situation.

For example, “Whenever I’m feeling down, my sis-light always knows how to make me smile.”
A person might say, “Her presence is like a ray of sunshine – she’s my sis-light.”
Another might express, “I’m grateful for my sis-light who always brings positivity into my life.”

39. Sis-sunshine

This slang term refers to a sister who is always cheerful, optimistic, and spreads happiness wherever she goes. It highlights her ability to brighten up the lives of those around her.

For instance, “She’s like a ray of sunshine – my sis-sunshine always brings a smile to my face.”
A person might say, “Her positive energy is contagious – she’s everyone’s sis-sunshine.”
Another might admire, “I’m lucky to have a sis-sunshine like her in my life.”

40. Sis-moon

This term is used to describe a sister who is a source of guidance, wisdom, and support. It emphasizes her role as a guiding light in your life.

For example, “Whenever I need advice, my sis-moon is always there to listen and guide me.”
A person might say, “She’s like a guiding star – my sis-moon always leads me in the right direction.”
Another might express, “I’m grateful for my sis-moon who always provides a shoulder to lean on.”

41. GKMS

This term is used to describe a sister who may be angry or upset, but in a way that is usually justified or understandable. It implies that the sister has a strong personality and is not afraid to express her emotions.

For instance, “She’s GKMS right now because I accidentally broke her favorite mug.”
In a discussion about sibling dynamics, someone might say, “My sister is GKMS when she’s passionate about something.”
A person might explain their sister’s behavior by saying, “She’s GKMS, but it’s only because she cares so much.”

42. Sibby

A term of endearment for one’s sister, often used in a playful or affectionate manner. “Sibby” combines the words “sister” and “baby” to create a cute nickname.

For example, a person might say, “Hey sibby, want to go grab some ice cream?”
When introducing their sister to a friend, someone might say, “This is my sibby, Sarah.”
A person might post a photo with their sister on social media with the caption, “Spending the day with my favorite sibby!”

43. Siscon

A term used to describe a person, usually a male, who has an excessive or obsessive love for their sister. “Siscon” is a combination of “sister” and “complex”. It can be used both playfully and seriously.

For instance, someone might tease a person by saying, “You’re such a siscon, always doting on your sister.”
In a lighthearted conversation about sibling relationships, a person might admit, “I have a bit of a siscon, my sister is my best friend.”
A person might watch a TV show where a character has a siscon and say, “I can’t believe how obsessed that guy is with his sister!”

44. Sisypoo

A playful and affectionate term for one’s sister, often used in a teasing or endearing way. “Sisypoo” combines the words “sister” and “poo” to create a cute nickname.

For example, a person might say, “Hey sisypoo, want to watch a movie together?”
When joking around with their sister, someone might say, “You’re such a goof, sisypoo!”
A person might send a text to their sister saying, “Miss you, sisypoo! Can’t wait to see you.”

45. Sislette

A term used to affectionately refer to a younger sister, often implying a sense of protectiveness or care. The suffix “-lette” adds a sense of smallness or youth to the word “sister”.

For instance, a person might say, “My little sislette started kindergarten today.”
When talking about their family, someone might say, “I have two older sisters and one little sislette.”
A person might post a photo of their younger sister on social media with the caption, “My adorable sislette just turned 5!”

46. Sislingo

A term used to describe the unique language or slang that siblings develop and use when communicating with each other. “Sislingo” combines the words “sister” and “lingo”. It refers to the inside jokes, shared phrases, and special words that only siblings understand.

For example, a person might say to their sister, “Remember that time we got lost in the mall? That’s some classic sislingo.”
When reminiscing about their childhood, someone might say, “Our family has so much sislingo, it’s like our own secret language.”
A person might write a birthday card for their sister and include a message like, “Happy birthday to my partner in crime and the only one who understands our sislingo!”

47. Siblet

Siblet is a term used to refer to a younger sister. It is a combination of the words “sibling” and “let,” indicating a smaller or younger version of a sibling.

For example, “My siblet always copies everything I do.”
In a conversation about family dynamics, someone might say, “I’m the oldest, so I always have to look out for my siblet.”
A person might introduce their younger sister by saying, “This is my siblet, Sarah.”

48. Sis-bro

Sis-bro is a slang term that combines the words “sister” and “brother.” It is used to refer to a sister who has a close relationship with her brother or exhibits traits typically associated with brothers.

For instance, “My sister is such a tomboy, she’s a total sis-bro.”
In a conversation about sibling dynamics, someone might say, “I have a sis-bro relationship with my sister – we’re like best friends.”
A person might describe their sister by saying, “She’s not like other girls, she’s more of a sis-bro.”

49. Sis-tah

Sis-tah is a slang term used to refer to a sister. It is a playful variation of the word “sister” with a slight emphasis on the “tah” sound.

For example, “Hey sis-tah, can you help me with my homework?”
In a conversation about family, someone might say, “I have the best sis-tah in the world.”
A person might use the term affectionately, saying, “I love my sis-tah to the moon and back.”