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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
A large quantity of something awesome, can also be used as a measurement of some thing awesome.
There are a grundle of tattoos on that man's foreskin.

That chip is going to make you car a grundle load faster.
by bamf bromine April 05, 2011
1. The small particulate matter or shake that remains in a stash of marijuana once all of the larger "dank nuggets" are gone.
2. (In male human anatomy) the area between the scrotum or ball sack and anus or butt hole respectively. Also commonly referred to as the taint.
1. Dood grundle is like smoking dust.
2. When I wrecked my bike the seat hit me right in the grundle.
by Sea of turds January 05, 2011
The trashiest excrements of trailer park septic tanks, which, when mixed with crack-cocaine form into an American of sub-average intelligence, and are of the lowest societal and economic standing possible, ever.
Is that grundle pregnant, again? Shoot, it looks like her dad forgot to wear a condom, again.
by greedy grundle groper February 22, 2010
Old Man's nappy hairy sweaty space between balls and turd cutter. Often smells of a ripe cheese. Can be used as a ShamWow.
Sniff my GRUNDLE mid coitis.
by The JYKLE February 19, 2010
The area between your ball sack and ass
"My grundle was so ichy yesterday"
by Jon Smith12121212121212 November 15, 2009
grundles or grundle shavings are commonly used for the word/s pubes or pubic hair
Eww his grundles were seeping out of his shorts.
by o milinhos July 05, 2008