Top Definition
The patch of hair between your balls and asshole (the grundel) and when it gets too long, it looks strikingly like a mohawk.
"Yo Jimmy, give me a couple minutes, I have to go trim my Grundel Hawk because I am expecting a rim job from Wendy tonight."

"I need to shampoo my Grundel Hawk, that shit just stinks."
by Shower Fart September 10, 2008
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