Knuckle Fuck

When hitting a large jump (booter) mainly on skis there is a roller or knuckle that the jump sits on. If you hit that jump and land a little short that is called a case. But if you case the jump so hard that you are ejected from your skis and you thrust your body so hard against the landing that is called a Knuckle Fuck because you are fucking the knuckle.

Dude, that guy hit the pro jump line and knuckle fucked the last jump.

by AbsorbedSpoon3 July 5, 2019

mayonnaise knuckle bump

When two bros go to knuckle bump each other and one has knowingly left ejaculation on his fist.

Ben: Hey brotha, what’s up? *offers knuckle forth for knuckle bump*

Chad: no man, I’m good, looks you got that mayonnaise knuckle bump there…

by JessaCali September 10, 2023

Pop a Knuckle

The act of inserting a finger into one's anus, usually down to the knuckle.

I'm gonna pop a knuckle in!

by CellularSoul August 4, 2025

Forth knuckle

The forth knuckle is an informal term for the wrist

She was so loose I was able to stick my whole hand inside of her down to the forth knuckle she didn’t even make a noise

by Hugh J. Nus September 7, 2025

Knuckles

Do u know da wae?

knuckles: If U don't know da wae, U have a gey

by hetsmikkelbakje January 11, 2018

Douche Knuckle

Someone who intentionally tells someone else wrong information

Clifftopher: When is the English paper due
Danny: Wednesday
David: It's due Thursday
Danny: Oh yeah
Matthew: Way to go Douche Knuckle

by Davidisabab May 3, 2017

Knuckle Knocking

When two women vigorously scissor.

“Eating a combo of oysters & chocolate always has me in the mood for knuckle knocking.”

by LIZZ!3 December 23, 2020