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__ November 1, 2019
Get the national throw your sibling day mug.
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 4, 2021
Get the Slap Your Younger Sibling Day mug.
Its national throw your sibling day let your sibling throw you across the room and you do the same!
Boy: Hey its October 3 you know what that means.

Sister: No?

Brother: Its National Throw Your Sibling Day! GET OVER HERE!
by Exivity October 1, 2021
Get the National Throw Your Sibling Day mug.
May 4 is national embarrass your sibling day
today May 4th is national embarrass your sibling day
by Sarah 🤠 March 19, 2020
Get the national embarrass your sibling day mug.
July 12th is national punch your sibling day! (If you don’t already do it every day) today is your day to shine! If you don’t have a sibling punch yourself because only children are pussy’s.
Person one: I can’t wait to punch my sibling! On national punch your sibling day!

Person two: I already do that everyday man!

Person three: I’m a pussy I don’t have a sibling
by Benny19 July 12, 2018
Get the National punch your sibling day mug.
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
Get the National slap your sibling day mug.
December 18th its National slap your siblings day whether you have one sibling or 5 and your parents can get mad about it!
Mom:WHY DID YOU SLAP *insert siblings name*

Child: It's December 18th, National slap your siblings day

Mom: What-
by Gachafro December 7, 2021
Get the National slap your siblings day mug.