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1. The hairy sector separating your bunghole from your dilly-dally.

2. A room in a house/apartment specifically for men to hang out at, also referred to as a "man cave".
After a long, hard day of working in the yard, I love to come inside and scratch my sweaty grundle.

Man 1: Dude we've got the Nintendo 64 all hooked up in the grundle! Come over!
Man 2: Cool, bro! I'll bring over some PBR and an extra controller!
by SillySailor500 September 28, 2011
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114
the perineum, especially the male perineum
I tried to shave my grundle but I just ended up making it itch.
by The Return of Light Joker November 18, 2011
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115
I was pressure washing my lawn when a wasp came right up to me and stung me right in my grundle.
by Sgt. Wetwipe June 19, 2016
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116
The place between you balls and your asshole.
FYI do not shave your grundle unless you want to walk around itching your grundle every second.
Bro, my grundle is so hairy I can make towers out of them by doing twists.
by Furry_grundle69 February 04, 2018
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117
The perineum on a human male. Located between the scrotum and anus. Aptly named after the hairyness of the Grendel monster from Beowulf and a young polishman's genitals. Originated in Jessup Maryland circa 1994.
"Mike has a super hairy grundle and his girlfriend Ann wouldnt go near it, so he dumped her"
by Double Bs July 13, 2016
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118
The perineum on a human male. Located between the scrotum and anus. Aptly named after the hairyness of the Grendel monster from Beowulf and a young polishman's genitals. Originated in Jessup Maryland circa 1994.
"Mike has a super hairy grundle and his girlfriend Ann wouldnt go near it, so he dumped her"
by Double Bs July 13, 2016
Get the Grundle neck gaiter and mug.