When in loathing with someone or just a fit of spazmatic rage, you proceed to vomit ("up-chuck") in the offenders face followed immediately by a swift punch to the face.

Also: knuckle-chucked, knuckle-chucking
Ted was being such a d-bag yesterday that without really thinking I knuckle-chucked that punk.
by PiratesLifeForMe_AAR April 18, 2008
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The act of aggressively masturbating.
To stroke your cock in a very enthusiastic way.
I could hear the dude in the next stall knuckle chucking .

Mark has been locked in his room knuckle chucking ever since getting home from the strippers.
by Fukucifer August 28, 2017
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1. Noun. The male ejaculate by way of manual masterbation.
2.Noun. Derogatory name give to person in place of "jerk offs." Commonly used in military environments where swearing or more conventional insults are discouraged.
"Listen here you little knuckle chucks. You best not be messing things up!"
by Makinnak January 14, 2017
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A hand job or male masturbation with 1, 2, or 3 knuckles of a finger in the anus to stimulate the prostate and cause a sudden intense orgasm.
Dude, I finally got a 3 Knuckle Chuck! I came everywhere!

You're definitely gonna buck when she hits you with a 3 Knuck Chuck!
by Umakhi June 16, 2022
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