sibling

A brother or sister.
A being with whom you share parents, whose sole purpose is to destroy your life.

In general, younger siblings are slightly more annoying than older ones, although in general older siblings are meaner and stronger so beat up the younger one.

by Goldfish United! February 26, 2009

National slap your sibling day

When it hits the 16th of November, don't forget about "National Slap Your Sibling Day".

Stepsiblings included.
Have a slapping time on the 16th! A day to mark in your calendar.

"Ow, why did you hit me?"
"It's National Slap Your Sibling Day!"

by UrbanWriter123 November 16, 2021

Sibling Fucklery

Siblings that fuck each other. Brothers on Sisters, Sisters on Sisters, Brothers on Brothers, Brothers on Brothers while their Uncle watches from the closet.

Setting: Father of 2 daughters at bar with a friend.
Father: “I walked in to my oldest daughters room Late last night to borrow her iPad & witnessed both of my daughters in bed in the ‘69’ position. WTF???
Friend: “Sounds like you’ve got a case of ‘Sibling Fucklery’

by Litcunt February 4, 2020

Siling

A kind person with an even kinder smile.

She's a real Siling!

by rocketleaguenerd01 May 8, 2022

Slap your sibling day

Slap your sibling day is 4th of december

*slaps*
OW! What was that for?
It's national slap your sibling day!

by ~secret sibling December 3, 2020

Sibling

Hell in a human form. Unfortunately, they related to you.

My younger sibling drew a self portrait of himself. With lipstick. All over my algebra homework.

by Captain Lieutenant November 29, 2015

Sibling

One's exact opposite, created by someone's parents to torture him/her until death.

Sibling rivalry is common among siblings.

by Ausie Badass December 7, 2003