Gruntosaurus Rex 

taking a dinosaur-sized crap; would win the "shit of the year" contest; the kind of dump where you lose weight.

After not crapping for a week, I sat down and loaded up the bowl with a Gruntosaurus Rex.

Gruntosaurus Rex by DinoDave May 6, 2010

grungas

The built- up secretions that create clumps in the hair surrounding your asshole.

He spends the majority of his shower time diligently eradicating stubborn grungas.

grungas by Dr Bunnygirl March 1, 2018

Gruntswell 

Grunting while working out, so that all the haters can see how jacked and tan you are.

Hey broski, I'm on my way to Strong Island Gym to get my "gruntswell on", wanna join me?

Gruntswell by BenGordon October 18, 2011

Grizzle Grunts

Are the crumbs left over from baking a pie in someone's pussy and/or ass.

Is also the king of World of Warcraft.

Damn those were some good grizzle grunts out of ron and jimmy's ass.

Omg über pwnage I met king grizzle grunts from WoW

Grizzle Grunts by Antone_shackleten February 24, 2009

Runny grunts 

Runny shit, diarrhea, watery poop.

Goddddd, I was taking a shit dude and it was sooo watery and runny and I was grunting really loud as the watery poo came flying out my asshole.

So this afternoon I went to the bathroom. I had to shit so bad that I couldnt hold it prior. The second I pulled my pants down runny grunts went flying all over the back of the toilet seat. It was nasty!

Runny grunts by Bobby Knobi May 28, 2010

grubtastic 

Used to describe a particularly good food.

My god, this oatmeal is grubtastic!

grubtastic by Jake December 8, 2004

Grutasphobia 

phobia of talking to a girl with a nice voice even though her face's not so pretty.

"I have experienced grutasphobia before"

Grutasphobia by BDK Peeps December 23, 2021