sib-friend

when a friend becomes fully integrated into your family

when sib-friends talk to each other: how's mom doing?
...imma live in your basement

by mox+gam November 29, 2020

Step sib

the friend who isn’t a brother or a sister but a step brother or sister (you don’t fuck your siblings but you’ll fuck a step sibling)

*Also called a Step Mom(my) or Dad(day)

You’re my favorite Step Sibling !

by Wreck Ralph October 6, 2017

dirty sib

a dirty sib is when you ejaculate so hard you blow the tip of your dick off

take me to the hospital i pulled a dirty sib

by harry peckerwood September 7, 2021

sibs with benefits

A consensual incestuous relationship based on convenience and mutual need rather than romance. Like friends with benefits, only the couple are siblings.

Kelly was tired of having only losers for boyfriends, but she didn't want to be lonely anymore. She asked her cute little brother Eric if he was interested in adding sex to their already close relationship, and he agreed. They weren't in love or anything, it was more of a sibs with benefits arrangement.

by t045t March 16, 2009

SIB

stupid idiot boy

Lucas you’re such a sib

by BigSib May 20, 2025

SIB

spontaneous involuntary belching

excuse me, I got that SIB.

by Crawton March 8, 2024

sib

You could call your friend sis or bro, but what about sib? It’s rEvOlUtIoNaRy!
bro= brother
sis= sister
sib= sibling
It’s great for ur non-binary pals

a: I just got a sugar daddy
b: Yesss, get it sib!

by iamitSIB December 24, 2019