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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 

One who graps his penis with his hands in a white knuckle grip and vigorously jacks his cock off.
That David is such a knuckle fucker.

knuckle fucker 

No chance mate - shes a knuckle fucker
knuckle fucker by dkp June 29, 2006

Knuckle Fucker 

When Ethan won’t shut his mouth
“Hey Ethan, Stop being taking and being such a knuckle fucker”

knuckle fucker 9000 

to fuck a knuckle 9000 times

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
More from Urban Dictionary

briefcake 

"Did you check out the briefcake in courtroom C?"
briefcake by Ben Frey April 6, 2006
Word of the Day on November 3, 2026
Brought to public attention by Bob Woodward and Carl Bernstein in the book on the fall of Richard Nixon, All The President’s Men, ratfucker was Nixon’s term for a political operative who sows chaos among opponents; an agent provocateur. It is thought to have originated among campus political rivalries at USC, and seems to have some usage in the US military.
Along with Nixon’s other ratfuckers, Roger Stone caused fights at otherwise peaceful Democratic Party protests to generate a false narrative that the Democrats were violent and dangerous.
Ratfucker by Ricky Ramjet November 2, 2017
Word of the Day on November 2, 2026
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