loaded knuckle 

The act of forcing your entire fist into your gf mouth to prevent her from saying her safe word while fucking.

“Fuck all Aaron, don’t you dare try that loaded knuckle bs with me again this time!”

loaded knuckle by Brandy3Brown November 27, 2020

klukow 

to achieve sexual satisfaction by rubbing your knob between a woman's butt cheeks--often because she won't do anything else with you. The woman is usually bored, and would normally be trying to do something else while you finish your business.

Stacie wouldn't sleep with him, but she used to let him klukow her while she flipped through a magazine. I can't believe he let that situation exist for two whole years.

klukow by sguire August 21, 2012

High Knuck 

It's just like high five mixed with fist bump. You raise your knuckle high and the other does as well you bump your fists.

Guy 1: Bro, you sleep with that asian bitch?
Guy 2: Yeah, nigga she was Jackie Channing my dick. I had to donkey punch her in check. She wouldn't listen
Guy 1:Was the pussy good?
Guy 2: Hell yeah
Guy 1: "High Knuck"

High Knuck by Dizzy Rascal IMJ April 24, 2012

Tat Knuck 

A person who has letters tattooed on their knuckles that may or may not form a word.

This Tat Knuck fuck was making my Shwarma and I saw Love and Hate on each hand. Dude decide.

Tat Knuck by will bitten May 26, 2018

Sunken Knuckle 

To put your finger inside a girls vagina past the knuckle, the act of fingering a girl

ah you know tanya from the club? i gave her a sunken knuckle

Sunken Knuckle by callowjohnny May 8, 2010

Fuck Knuckle 

n, a noun to describe the type of person who upon seeing you immediately want to fuck right in the face with your knuckle,

v, a Fuck Knuckle is a person who would benefit from having their face rearranged on a permanent basis using only a fist

Sean: "Jo do you see that Fuck Knuckle across the street?"

Jo: "Yeah go put his face in a new shape, He's a Fuck Knuckle!"

Fuck Knuckle by The Fairy Sesh Mother November 26, 2019

Knuckle dunking 

Inserting your fingers into a woman’s vagina up to your knuckles.

The wet spot on the bed was enormous after Britney received her first knuckle dunking.

Knuckle dunking by WordMagic May 30, 2018