Top Definition
The growth of an inflammed, festered, and bloody hemorrhoid that creates a groove-like affect in your feces.
Dave, don't do it. Jeff has an ass knuckle, that's not going to be fun.
#ass router #turd splitter #puff the magic ass-dragon #sphincter splitter #old rusty sheriff badge
de Sean Piner 30 septembre 2006
Someone who is clueless or stupid.
"Dude the new guy is such a dumbass!

"for real, he's a total friggin' ass-knuckle!
#ass #assknuckle #dumbass #stupid #moron
de Skin bone 21 mai 2011
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