חפשו מילה כלשהי, כמו fleek:
 
1.
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.
מאת Sean Piner 30 בספטמבר, 2006
 
2.
Someone who is clueless or stupid.
"Dude the new guy is such a dumbass!

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