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.
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 6, 2005

by katiethelady March 13, 2015

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.
by Jezani May 10, 2009

by King David October 8, 2004

by DoctorFunkenstein August 31, 2004

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.
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 22, 2010

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."
Stoner #2: "Yeah I hear they got nuggies for late night tonight."
by sirben_ December 30, 2020
