Butt Knuckle 

When a male wears his pants/shorts extra tight and his balls are showing. The opposite of Camel Toe.

Check out the Butt Knuckle on that guy!!!

Butt Knuckle by Skinnywalker January 13, 2005

New York Knuckle 

When you are fisting someone, and then abruptly and without warning, pull out and punch them in the face.

She said something stupid when I was fisting her, so I gave her the New York Knuckle and she shut up.

New York Knuckle by drewcifer000 February 25, 2008

Moose Knuckle 

N. The split bulge in a mans pants caused by wearing jeans that are too tight. More often than not, these jeans are manufactured ny Wrangler.

Holy crap! That dude has hella Mosse Knuckle!

Moose Knuckle by Craig October 28, 2002

purple knuckle 

A dude who has been holding on to the same beer for so long, his knuckles are turning purple

Damn, Green Mike has been on that same beer for so long now, he gots a case of the Purple Knuckle

purple knuckle by Big Nation March 27, 2003

Moose knuckle 

A moose knuckle is equivalent to a camel toe on a woman, only on a man. It is when a mans testicles are pulled up tight and/or high and separated by the seam in their pants causing the appearance similar to a moose knuckle. Called thus because larger than sister equivalent the camel toe

For the love of god man get something to control that moose knuckle you got on you!

Moose knuckle by Ansoberry November 6, 2010

iron five knuckle pron shuffle 

Rather than refering to masturbation, the iron 5 knuckle pron shuffle refers to:
1)getting fisted by a large man/a group of men
2) getting completely obliterated by an obviously stronger person/force; Synonyms- Pwned, Owned, Destroyed

Guy 1 :So I was playing Ninja gaiden and-
Guy 2 : lemme guess, they did the iron five knuckle pron shuffle?
Guy 1 : I fucking hate you

iron five knuckle pron shuffle by Senor Bear July 26, 2007

Dick Knuckle

Dick Knuckle is when during an erection your penis is bent too far back or forwards and makes a loud pop.

Roxxy was riding my fat cock and leaned too far forward and I got a serious dick knuckle, OUCH!

While masturbating I decided to press down on my penis and I totally gave myself a dick knuckle!

Dick Knuckle by Burks August 10, 2009