Fucker Knuckles 

In the game of marbles, the positioning of the clenched hand, with the thumb inverted into the clenched fingers, which propels a marble toward the target group of marbles. So called because of the hand resembling the common masturbation technique utilized by men, and because of the thumbs insertion into the "hole" resulting from the clenched position of the hand and fingers.

When I was a shorty, I was the Fucker Knuckle champion of the block.

Fucker Knuckles by ken taylor January 2, 2005

Fucker knuckle

Typically when you finger a girl up to your knuckle. Sometimes when two men try and finger each other.

EX. I got fucker knuckled last night and it felt great!
EX. David and I need to try to fucker knuckle tonight.

Fucker knuckle by It's me bitch March 14, 2018

Fucker Knuckle

As pertains to construction site or job site lingo
A worker or person who is constantly screwing around and challenging rules, playing pranks, smoking cigarettes inside the building, being a general pain in the ass.

Listen here Fucker Knuckle! Rules are rules! If I catch you smoking in my building again, I’m gonna call your boss and have you removed from the jobsite.

Fucker Knuckle by Yellow Bucket 0659 December 30, 2021

knuckle fucker 

This is someone that is too stupid to be a Jackoff.

Biff is such a Knuckle Fucker, he can't get anything right!

knuckle fucker by JZ Blozzini February 28, 2008

Knuckle Fucker 

1. Slang term used for any male douchebag who is rude, disrespectful, belligerent, violent, angst-filled or otherwise aggravating on account of the fact that he can't get laid.

2. Any young male whose only real use is pumping protein samples into socks or garbage pails.

3. A griefer in an MMO.

1. "Hey knuckle fucker, sit down and shut the hell up, and stop making a scene because you're a limp-dicked little douchebag that couldn't get his dick wet if he jumped in a fucking lake."

2. Tuef, Bum, Toneslice, Noobslice, etc.

3. "I'm trying to get my gear fixed but there's some knuckle fucker spawn camping the repair guy." Also see #2.

Knuckle Fucker by JustAnotherGuy July 1, 2008

knuckle fucker 9000 

to fuck a knuckle 9000 times

Did you do the knuckle fucker 9000?

knuckle fucker 9000 by suckle the knuckle buckle my b February 7, 2018

Knuckle Fucker 5000 

A large black dildo (around 8-10 inches) attached to a pair of plastic brass knuckles (also black) to give pleasure to anything that lives. Offered by Dylan Godfrey from "The Sales Company" for a very good price.

Excuse me, Excuse Me
My name's Dylan Godfrey, I'm with the sales company
I was wondering if you'd be interested in buying one of our products...
What you're looking at here is a Knuckle Fucker 5000, it's good for pleasure, lot's of force to it so uh I don't know you might enjoy it
Hello, hey? Are you interested in buying one of these?
Nope, nope alright well then have a good day!

Knuckle Fucker 5000 by Caleb_DeBrusk September 9, 2020