grundie 

when your underwear goes up your butt, the same as a wedgie.

Sarah has a grundie she has to pick it.

grundie by Kate0304 July 24, 2008

Grundie 

Grundie is multiple artsy alternative fashion/aesthetic styles mixed together, specifically the mixing of dark and edgy grunge style with colorful and creative indie style. A person identifying as grundie will have a collection of eclectic things that don’t fit into one aesthetic. They may find themselves embracing multiple aesthetics at once, wearing all black with red accessories one day and tie dye with all black accessories the next. They will probably hand make much of their room decor and enjoy customizing or up cycling their clothing. They’ll probably also enjoy a large variety of music genres, from country, to pop, to screamo.

“What would you say that person’s style is? They can’t seem to decide.”

“Oh, they’re probably grundie.”

Grundie by Bones_h March 29, 2021

Grundie 

The act of taking a massive bowel movement other than at a authorized drop zone for terds.

I thought I was going to make it home and take a shit, but I stopped and dropped a mean grundie right on the side of the road.

Grundie by Rickastley333 October 20, 2021

grundie 

Ted Bundy's grundle

Ted Bundy has a smelly grundie

grundie by T-69 March 8, 2023

undie grundie 

The act of inserting a finger or thumb into an unsuspecting victims anus through their fresh new underwear, thus causing a permanent poo stain. If done in a forceful manner, blood stains may accompany the poo stains.

Paul surprised Steve with an undie grundie...a large fight insued.

undie grundie by Mutato January 30, 2008

grundel 

Grundel is another word for chad: the region between the balls and the arse-hole; can be an erogenous zone for some.

Girl: I was fingering that part between his balls and his arse and there was shit there.
Everyone listening remained silent but later laughed among themselves:
'Eww! He had a shitty chad.'

When you measure your dick, you don't start at the arse-hole and include the chad; you risk getting shit on your measuring tape.

Q: What on earth is a grundel?
A: You know, the chad, the part between balls and arse.

grundel by Chane. January 17, 2021

grundle fish

The act of diving head first into the groinular area looking for some fresh, salty grundle.

Gian grundle fishes like a truffle pig looking for black gold.

grundle fish by j$.devops October 5, 2010