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.
av Sean Piner 30 september 2006
1 more definition
Someone who is clueless or stupid.
"Dude the new guy is such a dumbass!

"for real, he's a total friggin' ass-knuckle!
av Skin bone 21 maj 2011

Gratis daglig E-post

Skriv in din E-post adress nedan för att få vårt gratis Urban ord för dagen varje morgon!

E-posten är sänd från daily@urbandictionary.com. Vi kommer aldrig spamma dig.

×