national throw your sibling day

when your nutted down your siblings throat and they are about to tell your parents you throw your sibling.

I nutted down George’s throat so he went to tell Mum so I threw him. (It was National Throw Your Sibling Day after all).

by thebear06__ October 31, 2019

Slap Your Younger Sibling Day

On October 4th, anybody who has a younger sibling can slap them, and they cannot fight back, cry, or complain. They must accept the slap.

Older brother: Hey, guess what?
Younger brother: What?
Older brother: It's Slap Your Younger Sibling Day!
Younger brother: Fine, you can slap me.

by delta! October 3, 2021

Half Sibling

A sibling who you do not have the same parents as. HALF siblings either have the same mother only, or the same father only.

Since Wendy and Sally are sisters, and they do not have same father, they are Half Siblings.

by Fame Hungry June 17, 2009

Sibling

A combination of a best friend and a punching bag

Tony is my sibling. He bugs the heck out of me, but I love him so much.

by Mystic_Snowfang July 2, 2008

Sibling Zone

Pretty much the Brother Zone and Sister Zone mashed into one convienient term.

Jen told me she liked me like a brother. How the fuck do you get out of the Sibling Zone?

by Mofos in the Zone November 5, 2009

Quarter sibling

In which two individuals do not share the same mother or father but rather connected through the same sibling.

Can’t wait to hang out with my quarter siblings!

by ThtCoolKid November 17, 2019

Younger Sibling

a small brat.

me: look at that small brat who is my younger sibling

by failedabortion May 3, 2021