When masturbating or getting a hand jobthe cum shoots out and falls back down onto the persons knuckles.
I asked Mary if she wanted some cum knuckles since she was on the rag.
by wario December 3, 2008
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1) the result of wankin' it in the shower; the jizz runs down your hand, and gets stuck to your knuckles

2) a very unintelligent individual, or someone who happens to have said something stupid in the recent past
1) Goddammit! I hate when I come to class and still have cum knuckles... should've cleaned those bitches after jackin' it this morning
2) "I thought baseball was only seven innings." "Shut up, cum knuckles."
by buttceth April 27, 2013
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Barbaric way to impregnate a woman. The correct method would involve firstly restraining a woman. Next a male will proceed to orgasm onto his fist where he will punch the female in the vagina. Repeat with fresh cum every 2-3 hits to insure efficiency on this most delicate of procedures.
This valentine's day my wife and I will be cum knuckling our night away after I take her out for a nice seafood dinner.

-or-

I was about to cum knuckle you babe, why do you look so sad?

Cum knuckled is the correct past-tense.
by Slacks.Hoxsie February 17, 2009
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when you beat your cock so fucking hard your knuckles are slathered in cum
OMG I had the biggest case of cum knuckles when looking at a picture of ur mom.
by ryangb871 January 20, 2022
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What one usually has after masterbation and proper containment techniques where not utalized.
U'h oh, oh shit, I got cum knuckle.
by The Green Monkie September 8, 2004
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when u cum on ur knuckles and punch a chick in the face when ur fuckin her
"i totally gave my girl cum knuckles last nite"

"dude was she pissed?"

"hell ya she has a black eye"
by THE CUM KNUCKLER September 13, 2009
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The Ugandan cum knuckle is a sexual act where during sex you ask your partner if they "Know Da' Wae", and if they do not "Know Da' Wae" you punch them in the face with a fist full of CUM.
She didn't Know Da' Wae, so i gave her the old Ugandan Cum Knuckle.
by Ancient Armadillo September 27, 2018
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