Male: The region between the scrotum and the asshole.

Female: The region between the vagina and the asshole.

Also known as a "taint"
"It feels good when you lick my grundle."

"Why is it called a taint?"
"Because it taint da pussy and it taint da asshole."
by Fat Dave February 18, 2004
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The land bridge between your nutsack and butthole.
I like it when a guy rubs my grundle before jamming his figner in my ass.
by Travis Marks January 12, 2004
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The ripe smelling portion of the male anatomy that grows some of the best fromunda cheese. Its best to be licked here with your whores finger in your ass while being simultaneously jerked off.
Shooowee, my girl was lickin' my grundle with a finger in my ass while she was jerking me off the other night, and when I came I almost shot her eye out!
by Slickman5000 August 10, 2004
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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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(gr un d el)(noun)Space between your junk & dirtshoot. (also no as taint & chode)
Scott HArniman's is a grundleless wonder.
by scott harniman May 7, 2003
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