Sibiling 

A Brother or Sister. Or Many of them (Sibilings)

Person 1: How many sibilings do you have?
Person 2: I have 2 sisters and 3 brothers.

Sibiling by MeLoveToSleep June 18, 2011

sibilacrotism 

Welp, mccuck said it so its a word

Woah? that is just sibilacrotism dude

sibilacrotism by ImZebrahh October 2, 2018

sibilation 

A strong relationship with a sibling

Person-hey
Siblings- hi

Person-you too have a great sibilation

sibilation by Milly nugget September 14, 2019

Sigils 

Member of the Regulars, Weak knees, short, bald

"Sigils weak knees."

Sigils by averboo September 14, 2021

sibilocratism

New word used by Twitch users on Asmongold's Twitch stream.

SIBILOCRATISM! See, I just made up a word. Twitch chat, start using that word!

sibilocratism by Archmagebob October 2, 2018

SIBILOCRATISM

The act of using Urban Dictionary as if it's a real dictionary. (Particularly used by balding streamers)

Asmongold's sibilocratism is almost as bad as his bald spot

SIBILOCRATISM by Dominotical October 2, 2018

Sibiling 

The word Sibling spelled incorrectly.

I hav a brutha and sistah, thay is my sibilings.

Sibiling by RiCHeeGee April 2, 2019