A thick, sticky, dark brown substance with putrid ripe stench oftentimes found within the area between a person's asshole and genitals.
Holy fuck, what smells like a decaying corpus?....Off courrsee it's the Grundle Tar stuck to Horvach's gooch!!!
by D. P. Dot Dirtbag October 3, 2010
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when you are engaged in oral sex OR receiving a hand-job just before you are about to ejaculate, she then pokes you in between the anus and ball sack.
while I was on the computer, looking up many various words on the Urban Dictionary website, I looked over beside me, and all of a sudden, I see my roomie receiving quite the vigorous Grundle Poke I have ever seen...
by R.Tripp February 23, 2011
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by Grundle Fairy December 20, 2012
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by Billybobbly man tits November 18, 2018
Get the grounch mug.john gave louise a hard GrundleBundle last night, eye sockets full of testicles and mouth full of anus.
by QuifingChopper June 2, 2019
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