knucklefucker 

A man who masterbates

John knuclefucked himself before he went to sleep.

knucklefucker by Dan March 2, 2005

knucklefucker 5000 

A dildo, preferably large and black attached to some rubber (or brass if you're that hardcore) knuckles.

"Man you should have scene that crazy bitch's closet. It was full of knucklefucker 5000's !!

knucklefucker 5000 by CanadianSyrupSperm December 9, 2017

knucklefuckle 

When two people go in for a handshake and one person puts up knuckles and the other person goes for a standard handshake. A fucked up handshake or a fucked up attempt at one.

The boss went to shake my hand and I gave him knuckles on accident. What a knucklefuckle.

knucklefuckle by DV8DUG September 27, 2017

kentucky knuckledunker 

A phrase used to describe "fingering" a female while driving through the state of Kentucky.

I gave her the good ole Kentucky KnuckleDunker on our way home from Nashville last week.

kentucky knuckledunker by JimBro Watty March 20, 2016

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