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

grundle butter 

An unfortunate gelatinous sweaty buildup on the grundle (which is the hair and area between your genitals and arse-hole).

I pulled off my jock and found a pat of grundle butter on it.

grundle butter by madmark65 October 28, 2003

grundle butter 

The left over cum on your dick and the cum that seeps back out of your partners twat after intercourse eventually mixing together and settling in your crotch.

I could have had a fish fry with all that grundle butter.

grundle butter by Zac Hulsey January 11, 2006

grundle butter 

A build up of sweat and unwashed buttcrack that results in a sticky, buttery poo-paste that may stain underwear or make it difficult to wipe successfully.

"Oh man, I keep wiping but there's just so much grundle butter! Maybe it's time to see a doctor..."

grundle butter by slipperysl_hoe_pe November 29, 2018

butter the 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

butter the grundle by Giggle berry June 18, 2014