A white chick who loves to get ass-to-mouth from a black dude. Think ATM for a Mudshark. Can also be used as a verb.
Yo that bitch is a total Grendel.

or

Damn, I am totally gonna grendel that blond over there.
by provisio October 25, 2009
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1. A giant beast that lives in a lake with his mother in the epic poem Beowulf 2. A giant beast that lives in the pants of a male human (if you catch my drift)
Go suck on a grendel!
Dude, he has a nine inch grendel.
by Doug Hurlburt October 6, 2005
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a name for an obscenely ugly female. Spawning from the mythical beast in the book Beowulf, the name represents a large/fat/ugly/hairy or just generally disgusting display of womanliness
Dude, look at that Grendel!
Yeah, I wouldn't want to get in a fight with her, she'd kick my ass!
by bob marley January 28, 2005
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Slang term for The Green Door medical cannabis dispensary.
Joe: Im going to go to Grendel & get me sum ah dat platinum og kush

Jim: Whats Grendel guy?

Joe: Shut up faggot!
by Ronaldoe November 14, 2011
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Grenade comes from the show jersey shore meaning and ugly girl. Putting grendel infront of it basically means a girl that is hideous.
by William A Rees January 23, 2011
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The shot in a porno where all you see is a set of balls slapping against a woman's vagina from behind.
Sally and I were watching "Pokeherhaunches:The Tight Indian" and I was getting all hot and bothered until the 30 second Grendel Shot.
by heavyarmament September 2, 2014
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