NATIONAL Slap Your Friend’s Ass Day 

Slap your friend’s ass day is on July 28th so don’t forget to slap their ass

The definition of National Slap your Friend’s Ass Day is basically don’t pussy out and SMACK DAT BOOTY

NATIONAL Slap Your Friend’s Ass Day by Jax1995 June 27, 2019

Fuck your friend’s girl day 

On May 5th we celebrate Fuck your friend’s girl day

On this day we can have sex with our friend’s girlfriends

Hey Rose I know your my friend’s girlfriend but since it’s Fuck your friend’s girl day I think we should have sex!

Fuck your friend’s girl day by Alan Walker doin work April 18, 2022

Harvest your friend's organs 

Harvest your friend friend's organs day. You could do this without their permission. This day is on 24th December, so you could give your friend's organs to their family if you want!

Person A: Let me have your organs.
Person B: Why?
Person A: Because it's harvest your friend's organs day.
Person B: Fair.

Harvest your friend's organs by Fortnite babby pass November 17, 2022

National give your friend's money back day 

January 11 is the national give your friend's money back day, where people worldwide return the money they owe back to their friend!

You: Hey Ryan, Happy January 11!
Ryan: What's January 11th?
You: It's National give your friend's money back day.
Ryan: Cool man, here's your money back!

National give your friend's money back day by FriendlyNeighbourhoodIdiot January 11, 2023

Your best friend's girlfriend 

The girl that your best friend is dating, who is obligated to be a total bitch because of some subliminary life cliche. She will be clingy, possessive, and controlling, giving you little to no bro-time.

You and other friends will be forced to accept her into your social circle, but will talk mass loads of shit on her whenever you get the chance.

Your friend and your best friend's girlfriend-

"Hey bro, you still drinking with us this weekend?"

"Can't dude, I have to hang out with Carly."

"But broski, you've hung out with her everyday for six days now- Whatever, just bring her with."

"She doesn't want too, dude, sorry."

Your best friend's girlfriend by Austavious Rex March 30, 2010

your best friend's sister 

a stupid comeback phrase that's used for virtually everything, even if it doesn't make any sense whatsoever

Friend #1: dude! i saw your mom last night! she was hot!
Friend #2: your best friend's sister!
Friend #!: you have a sister!?

dude: what happened last night!?
dude 2: your best friend's sister!
dude: shut up!

your best friend's sister by dawg69 June 21, 2009

Beat up your blonde friend that’s name begins with the letter “G” day 

The day is June 16th, beat them up.

Person 1: Hey Griffin it’s June 16, you know what that means.
Person 2: No, what does it mean?
Person 1: It means that it’s Beat up your blonde friend that’s name begins with the letter “G” day. *Beats Griffin up*.

Beat up your blonde friend that’s name begins with the letter “G” day by Anon122843 June 15, 2023