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

GrundleBurger 

The process of spreading one's asscheeks while applying them over another's nose in the act of slumber.

I gave my neighbor a grundleburger when she was sleeping and i snuck in. The next day she had what i like to call "poopy nose"

GrundleBurger by Big Teddy Poop August 28, 2007

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

Grundlebumpers 

A male rubbing ones own grundle with another males grundle, behavior closely associated with two males giving up sexual realations with women to play " word of Warcraft " or " Aion "

Matt and Greg are the biggest grundlebumpers in the world!!! They would rather play Aion then go out and get laid

Grundlebumpers by Imperial18 October 2, 2009

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