knuckle dragger 

A strong or stupid person. Like someone on steroids or a caveman that can only grunt to communicate.

Call off your knuckle-draggers. Justin will pay you whatever you want.

Justin is a knuckle dragger. He believes everything on the internet is fact.

knuckle dragger by Lagz November 6, 2013

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 deep 

The act of using fingers to pleasure a female vagina and/or clit.

I drive my girlfriend crazy by shoving my tounge down her throat and going knuckle deep.

knuckle deep by Andy Holman October 11, 2005

knuckle supper 

an evolution of the knuckle sandwich, used in an situation of agression and conflict. To give someone a knuckle supper is to repeatedly hit someone in the face whereas the knuckle sandwich is to hit only once. Used by Richard Ayoade in Garth Meringhi's Dark Place playing the character Dean Leaner

Dean learner - "pipe down or you'll get a knuckle supper"

knuckle supper by anthony marriage June 14, 2007

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 touch 

The act of two/three people touching knuckles in celebration of something. While the knuckle touch is similar to the pound it is more gentle.

Bud and Justin knuckle touch after the sweet madden play.

knuckle touch by BudmanOfAlcatraz August 30, 2007

knuckle sandwich 

What the very elderly threaten to give to their great-grandchildren as an alternative to unappetizing food.

Great Grandfather: You don’t like lima beans, huh? Well, perhaps you’d rather have a knuckle sandwich.

*SMACK!*

Toddler: Wwwwwaaaaaaahhhhhh!

knuckle sandwich by AbnormalBoy May 11, 2004