knuckle suck 

To suck the fun right on out.

This party sure does knuckle suck.

knuckle suck by pinkieb July 23, 2018

Knuckle pucker 

A term for when you just can't explain how goofed a person is.

Holy shit Keenan, you're such a knuckle pucker.

Knuckle pucker by D-ton218 January 3, 2019

Knuckle Dusta

A popular variation of your typical knuckle touch/first bump with added, repeated horizontal motion so that both party’s knuckles gently grade against each other, thus creating a slight dusting effect. Note: it is vital that each participant exclaims in a high-pitched voice, “knuckle dusta” as they engage in said knuckle dusta.

I gave my homie Pete a knuckle dusta because it had been a hot minute since I had last seen him.

Knuckle Dusta by Bachata Horchata January 13, 2019

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.

Knuckle Fuck by AbsorbedSpoon3 July 5, 2019

knuckle buster 

when you punch a nigga real hard!

guy1: yo where is dan?

guy2: he got suspended because he got into a fight that man pulled a knuckle buster on that man!

knuckle buster by little man child February 24, 2020

Knuckle Sandwich 

When Larry's wife Lori puts all four of her knuckles in between Larry's asscheeks during sex. The asschecks being the bread and knuckles being the meat.

Lori gave Larry the knuckle sandwich combo last night after he forgot her birthday.

Knuckle Sandwich by paulbossup4life March 24, 2020

Knuckle balling 

Jacking off

I’m ugly and fat. Knuckle balling is my best option.

Knuckle balling by El Wappo. May 21, 2020