Noun: 1. A term used for undergarments worn for an entire business day that will more than likely need to be peeled off by the wearer as soon as he or she gets home.

2. Undergarments that must be taken off immediately one is able to do so in order to feel comfortable--usually giving off faint odor.

**In most cases, grendels have been worn longer than 12 hours or are crafted from unbreathable fabrics. The worst grendels are the ones worn underneath panty hose for 8+ hours.
After a long day of teaching tennis, Mark had to peel off his sweaty grendels and hop directly into the shower before doing anything else.
by geniusH August 5, 2006
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A female of a most certain significant level of haggardness; a female who possesses high levels of cellulite and rolls while containing more than one chin; a beat chick.
When Nick sobered up, he realized that he had fucked a Grendel.
by megahoner69 December 10, 2009
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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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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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