"The gusset" of a woman when wearing yoga pants.
Are these pants too tight on my banana grundle?
The act of applying speed glide anti chafing deodorant stick to the area located between the testicles, anus, and bilateral thigh area to avoid severe chaffing from prolonged friction
bob : Holy shit I just ran 5 miles and my asshole, taint, grundle, and thighs are bleeding!!
John: Well, you need to butter the grundle before exercising you dumbshit
When crap and lint is entangled in butt hair and crap, hair and lint all clumped together fall on the floor while wiping.
dude, I went to take a crap and there was grundle crumbs all over the seat.
the nutritious drink formed by the sweat between your anus and ballsack.
after taking his face out of ferman's ass, kenny quickly realized it was smeared with grundle sauce.
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When your grundle gets unbearably hairy, insects and animal life begin their new lives there.
Kishen refused shave his his Grundle Jungle because all of his pets lived in it.
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A creature that stalks you in the night waiting for when ur not looking and snatches your grundle. This creature is 3 ft tall, purple, hairy, makes a sound similar to "GIHEE", and can reach the speed of 47 miles per hour.
God Damnit, that grundle troll stole my grundle. Now i have to shit on my balls because my grundle has been stolen.
Grundle- The area between your asshole and your balls.
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festivity of playing with the grundle
hey sara, you going to grundle mania this weekend? it's gonna be a great time. Don't worry nothing will be tainted