A noun used to define the sticky build up found underneath the scrotum. Build up increases when the persons doesn't shower or has had hot sweaty day.
Person 1: Yo J-Kwon, take a wiff of this.
Person 2: Damn! What the hell is that on your fingers.
Person 1: I haven't showered in days, and that's some of my wicked bad grundle build up from my fat ball sack.
by Flo$$y B June 1, 2005
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A Jewish Grandma Troll often in an irate mood. Known to inhabit bridge underpasses in Palestine.
I was accosted by a shockingly hairy grundle as I made my way home from the meat market.
by katiethelady March 14, 2015
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Grundles are brown cave-dwelling creatures from the My Little Pony movie. They look like monsters to most people, but, as they constantly reassure Baby Licketysplit and Spike the dragon, "Grundles good!" They are helpful, friendly creatures. Interestingly, Danny DeVito played the Grundle Leader in the movie.
Grundles not monsters! Grundles good!
by Jezani May 10, 2009
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Ball perspiration, especially that found on the back of the balls
Patrick Ewing's jockstrap with brimming with grundle following that game against the Celtics.
by King David October 8, 2004
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The prime piece of real estate located conveniently between Scrotumburg and Anusville.
by DoctorFunkenstein August 31, 2004
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Underpants, Underwear, be it Boxers, Briefs, Thongs, high rise, low rise, cotton, rayon, or polyester.

Grundles is actually short for grundlemires, as panties is short for underpants.
If you cut somebody off in traffic and they start flipping you off or shouting obscenities, simply say "Hey, don't get your grundles in a bundle, pal."
by Sara B Ellum December 21, 2010
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The best dining hall at the University of Vermont. When you're hungry the grundy is always there with some pasta and marinara. Lovingly named after the area between a mans asshole and his nutsack, the gooch, if you will.
Stoner #1:"Hey broski you wannna hit the grundle?"

Stoner #2: "Yeah I hear they got nuggies for late night tonight."
by sirben_ December 31, 2021
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