Also known as the pereneum, taint, and a personal favorite SBAAB, the grundle is the space between the ass and balls...also the place ladies that you definitely want to aim for.
"Watch out or I'll tickle your grundle."

"Oh anything but the grundle!"
by Jessie October 19, 2003
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1. The hair that lines the fleshy area between the male scrotum (balls) and the anal cavity (butt hole).

The definition of "grundle" may also be confused the fleshy area that possesses the hair known as the grundle. This area is known as the "taint". See "taint"

*note: pubic lice that are known to inhabit the grundle are known as grundle grunts or scrotum skippers.
Man, my grundle is infested with grundle grunts.
by Tofu January 28, 2004
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(n.) the spot between the asshole and ball sack.
"dude, your grundle smells like 1000 dead hippies"
by smackfacedown August 20, 2009
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v. to lick the grundle
I'll usually ask someone to grundle me for awhile before moving on to rimming.
by John December 1, 2003
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The area between the schnackel and the hershey highway, that is often hairy and sweaty during ball-sackin whackin activity.
I'm currently settling down to a nice warm glass of grundle juice.
by Bob Smith August 18, 2003
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the area between one's scrotum and anus.
the real thing. "Gooch" can go to hell
by KinCryos August 9, 2003
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taint your balls and taint your asshole
stinky stip of skin between balls and asshole
by juice November 13, 2003
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