When fisting someone's anus, and you pull your fist out covered in poop.
I can't believe they didn't clean themselves enough to prevent me from getting monkey knuckles.
by unrealism September 6, 2021
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1. Buldge made by skin-tight underwear.
2. Showing of male goods with tight pants or shorts worn around lower chest.
3. Male version of camel toe.
see also: snake and eggs
That homo on his skates was showing his monkey knuckle.
by Mo.D. September 15, 2004
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When you hit some on the head, with your hand in the way a monkey walks on it's hands.
Michael Kyle: "When Calvin gets here...I'll use THE MONKEY KNUCKLE!"
Junior: "The what?"
Micheal: "THE MONKEY KNUCKLE! you know...(bops Juniors head with the Monkey Knuckle)
by Jedi_Master September 5, 2008
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In a fight, hitting somebody with combo after combo or hitting your oponent from all sides; on the head, in the gut, behind them, ect.

When a monkey fights they wild out hitting you any way they can
He got knocked out after getting hit with that monkey knuckle. You can't block the monkey knuckle.
by MiC Check October 12, 2005
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Like a camel toe but much smaller often referred to as a shetland vagina
Did you see her monkey knuckle? It was the smallest vagina I've ever seen.
by lunchbox#1 July 11, 2012
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A person who has limited brain power. Not retarded, but very unaware. A self induced simpleton, usually a pothead / stoner type move.

i.e. kin to a primate. Neanderthal (knuckle dragger)

mildly derogatory insult
"Monkey knuckle!, Why would you wash your bosses car with an industrial pressure washer?
by For Tony Baloney Matukas January 28, 2010
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