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1. shit knuckle
someone who does nothing. Sits around all day with their thumb up there ass to the knuckle.
Paul: Hey Todd, did you get that work done that you were supposed to do?

Todd: Aww, meant to, but didn't get around to it yet, sorry dude.

Paul: Yur a fuckin shit knuckle Todd, get to work!
2. shit knuckle
A bump protruding from a log of shit resembling a knuckle. Shit knuckle.
That dude is a real shit knuckle.
by Andrew X Jan 26, 2005 add a video
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