sibling slut

A person who switches their best friend from one sibling to another sibling more than once.

Jessica used to be best friends with my sister, Taylor. After a few years she was tired of that and became my best friend. That sibling slut traded me in for Taylor the other day.

by Smurfarcher August 12, 2018

milk sibling

Siblings who have the same mother

They can’t get married, they are MILK SIBLINGS!

by Midnightcoff September 23, 2021

toxic sibling

that one sibling that only leaves their room for food, but when they come out they're a total pain. you only get along with them when your being mean to some else otherwise you can't say a word to them without them getting mad or angry.

Latashia is def the toxic sibling, she comes out of her room, asks me what's up then yells at me to shut up.

by baldgirl February 4, 2021

Suffering Siblings

A song from the FNF mod "FNF: Pibby Apocalypse" features Finn and Jake from Adventure Time, corrupted by the darkness from Learning with Pibby.

Person 1: "Yo dude did you listen to Suffering Siblings? That shit goes hard!"

Person 2: "Meh, Come Along with Me better."

by mugsarecool November 6, 2023

sibling web

Any siblings or half siblings to you or anyone else in a sibling web. May or may not be related to you.

He's not my brother or half brother, but we are in a sibling web.

by Lexus14blacklist July 13, 2015

savior sibling

A sibling that is born to give their organs, bone marrow, and basically anything that can be used to save the sibling that was born before from a terminal ill ness
So basically they’re trying to save one kid by using the other and a lot of it is not consented by the donor sibling it’s self

My friend is being used as a savior sibling against her will

by Wisper and crispy February 3, 2020

sibling response

A response used by siblings that don’t like eachother, like “your mom”.

Person 1: Man, you’re an idiot.
Person 2: You’re an idiot!
Person 3: Bro, did they just use the sibling response? So lame!

by mp444 April 3, 2023