Protection of the patch of skin between the ballsack and butthole (grundle) by way of plastic or rubber inserts. Often attacked by hands or genetalia.
by GroupB May 5, 2014

by semondemon69 November 2, 2021

Godzilla Grundle is usually the place between the thighs and on the crotch area of any SHMonsterArts or NECA Godzilla figure. Term was (I think) originally used by JobbytheHong, popular figure reviewer.
by AltonFBF January 18, 2024

The scientific term for suffering from inordinate amount of sweat and wetness located around one's grundle. This nether-region, tucked between one's balls (or vagina) and anus, shows symptoms of Grundle Secretion (GS) due to any physical activity, sweating off the booze from a hangover, sitting in a chair that increases grundle temperature above the grundolgist-recommended 100.3 degrees Fahrenheit, among many others.
John: "Dude, when Megan and I switched airline seats I didn't think I would be sitting in a damp puddle. Do you think she peed?"
Grundologist Greg: "No John, she did not. She, along with 41% of other Americans, suffer from Grundle Secretion. That was just a mixture of her grundle butter. Airline seats often contribute to excessive GS."
Grundologist Greg: "No John, she did not. She, along with 41% of other Americans, suffer from Grundle Secretion. That was just a mixture of her grundle butter. Airline seats often contribute to excessive GS."
by McCuntBuckets January 26, 2015

by The Return of Light Joker November 18, 2011

Bruce was getting an old fashioned HJ and Stacy wanted to speed things up and gave him the old Grundle Knuckle to help him cum more.
by DanielleWhittier May 5, 2023

Referring to the potency of an individual's grundle at any given point. Grundle game is produced, and at it's peak, after a sweaty workout with da boyz.
by Furdaboyz June 15, 2017
