Taken from the words sibling and sabatical; occurs when two siblings take a break from communicating with each other because of too much time spent together or because typical sibling turmoil is wearing them out.

I'm so tired of my sister's whining and complaining about all of her personal issues. I love her, but we seriously need a sib sab for a few weeks.

Sib Sab by Indy Sparkplug May 13, 2010

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Sib-Snitch

When you tell your sibling to ask your parents for something you want and you hear them use your name.

"Tyler go ask mom for Mcdonalds"
"Ok"
*goes to mother*
"Mom, Ashley wants Mcdonald's"
*goes back to Ashley*
"Dude! you totally Sib-Snitched!

Sib-Snitch by Jazz J June 17, 2016

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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

sib-friend by mox+gam November 29, 2020

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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 !

Step sib by Wreck Ralph October 6, 2017

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