Grundlebutter 

A fowl wizard from the dark nether regions, who manifests cheeses that are unfit for human consumption.

Grundlebutter's cheese was dank and slippery.

Grundlebutter by StubbieJohnson December 4, 2019

Grundlebutter 

The butter from built up cheese in a warm crevous.

Grundlebutter is better than most butter.

Grundlebutter by Maelee1234 December 22, 2021

GrundleButter Keelhaul 

A hazing ritual or punishment in which an unlucky fellow is strapped to a pole or board, and with the help of many assistants is moved back and forth under an obese unwashed man's undercarriage, from the top of the crack to the back of the sack, in a wiping or scrubbing motion until dead or unconscious.

"Greg informed us that Revenge of the Sith is his least favorite Star Wars film, so I petition that his punishment will be a GrundleButter Keelhaul."

GrundleButter Keelhaul by PhatSphoincter October 1, 2025

GrundleButter Keelhaul 

A punishment in which an unlucky fellow is strapped to a pole or board and then held up by several men and swiped back and forth under an unwashed obese man's undercarriage, from the top of the crack to the back of the sack, marinating in the unholy 'butter' found therein.

"Jon said he doesn't like Star Wars, so he has been sentenced to a GrundleButter Keelhaul"

GrundleButter Keelhaul by PhatSphoincter October 3, 2025

Grundle Butter 

Grundle (Aka-Trundle) being the area between your balls and your asshole.
Butter being...butter

Grundle Butter is greasy Sweat that gathers in the Grundle region, Semi-transparent in color with a refreshing odor.

SFM-Trundle Butter

"Why is Steves asshole wet?"

"Thats just his Grundle Butter."

"Poor Bastard"

Grundle Butter by XPR November 30, 2004

grundle butter 

n. sweat from the balls and ass crack that congeal in the taint area.

'man, it's so hot today... i have so much grundle butter'

grundle butter by osu985 February 20, 2009

Grundle Butter 

Noun: A greasy semi-transparent fluid which accumulates in the area between the asshole and ball sack (known as the grundle)

Verb: Spread or cover (something) with grundle butter

Noun: "Why does that napkin smell like shit?"
"It's got grundle butter on it"

Verb: "Budget rental trucks pissed me off so bad I grundle buttered their doorknob while they were closed"

Grundle Butter by SurvivingMike October 30, 2011