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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
mugGet the sib-friendmug.

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)
by Wreck Ralph October 6, 2017
mugGet the Step sibmug.

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
mugGet the dirty sibmug.

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
mugGet the sibs with benefitsmug.

Sib

Short for self injurious behavior. Similar to sh (self-harm) except sib is doing something that hurts themselves, but isn't meant to inflict harm. But sh is trying to inflict harm on themselves.
Me: when I was younger I used to sib
Person: what's that?
Me: something I did to hurt myself but I didn't mean to
Person: isn't that sh?
Me: no I didn't do that until later in life, my sib was hitting my head when I didn't get my way
by That_Trans_Guy_Denki May 18, 2022
mugGet the Sibmug.

Sib

Sib is a very Big Mac fatty, she likes to eat 5 hungry jacks bqq cheese burgers an hour and complain that Indian food smells like Indians, she also likes soggy biscuits and many other soggy things
I’m hungry lets all be a sib
by Sib July 3, 2018
mugGet the Sibmug.

sibby-sib

A nickname for a sibling.
"Meet my sibby-sib!"
by theworldofurbanwords April 11, 2025
mugGet the sibby-sibmug.

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