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The perineum on a human male. Named after the hairyness of the Grendel monster from Beowulf and a young polishman's genitals.
"Mike has a super hairy grundle and Ann wouldnt go near it, so he dumped her"
by Double Bs April 18, 2008
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
the area between one's scrotum and anus.
the real thing. "Gooch" can go to hell
by KinCryos August 08, 2003
(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 07, 2003
The spot between your ass and your nuts.
I was scratching my grundle. Or, My grundle smell like shit hole.
by Zack Gradwell November 06, 2007
The entirety of one's package and asshole, to inlcude either to cock, balls, taint, and asshole, or vagina, taint, and asshole. One's grundle often bears the brunt of the day's heat and is most likely sweaty and horrific smelling.
1) I took my undies off and holy shit did my Grundle smell like rotten cottage cheese!

2) I'd love to punch that dude right in his Grundle

3) I heard it's very easy to get into her Grundle.
by Davy Grohlton June 23, 2012
v. to lick the grundle
I'll usually ask someone to grundle me for awhile before moving on to rimming.
by John November 30, 2003