Someone, usually a marsupial, who enjoys ramming their hands up other people's asses, all the way to the knuckles. This will of course cover the assailants hand in muck, leading to the obvious name
Bryan Jones doesn't care how old or what sex you are, he will jam you up the pooper hard, he is known as THE Muck Knuckler.
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Term that refers to the male hand while induldging in the act of self-pleasure. Such as masturbation.
So Dan, how was that ride on the Great White Knuckler last night.
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when a chick is jerking you off and you shoot a load all over her knuckles
"man i shot the coolest kansas white knuckler the other day"
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When Victor grabs his penis and squeezes too tight, thus, causing his knuckles to turn white.
Victor is a white knuckler masturbater.
A straight male that enjoys a finger in his butt during sexual intercourse.
I hear Garrett is a butt-knuckler.
A modern knuckle tapping movement in which the members show their affection and loyalty to one another by busting knucks as softly and as gently as humanly possible.
Welcome to the "Swash Knucklers" my friend.
When a black person takes their knuckle and shoves it up their partners asshole.
I heard he was a real black knuckler on her last night.