Semen discharged from an act of self-gratification, usually left to dribble over the thumb of the active hand.
I was in the bathroom after your mum took a shit, so I thought I'd use that time to fire off some knuckle-bastards.
by FormerSmurf April 7, 2015
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Get the Ugandan Knuckles mug.A knuckle tuck is when one curls up one's finger, tucks said finger into the receiver's anus, and continues to add more and more fingers.
by CarlTheCamel March 21, 2016
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