Flatgrass 

The pavement (shoulder of the road) as known by our friends in the animal kingdom.

Upon returning to the Dirty South... Me and Jim saw a large number of dead deer on the flatgrass.

Flatgrass by FAT-COUSIN May 19, 2008

gm_flatgrass 

A map on the popular half life 2 mod

garrys mod, it contaons a large field with small mountains in the distance, it also contains an arch like structure in the middle of it containing a secret room.

"Hey wanna go build a spaceship in gm_flatgrass?"

gm_flatgrass by Gordon feetman January 27, 2021

fartgrass 

referring to ones bum hair

“this morning I had a massive turd and now there are winnits in my fartgrass”

fartgrass by lunalovebaddd November 9, 2021

flatasstrophy 

The condition which causes the breakdown of the gluteus maximus muscle caused by age, poor genetics, or skipping leg day at the gym.

It’s apparent he isn’t doing squats in the gym because he has major flatasstrophy.

flatasstrophy by DefNotRight January 17, 2018

fangrasstic 

adjective-extremly awesome or fantastic. Word to describe something that is awesome beyond words.

boy: Wow! This book is fantastic!
girl: It's not only fantastic...it's fangrasstic!

fangrasstic by p-lander July 16, 2011

flatasstic 

If a chick is otherwise fine but her ass is lacking, she's flatasstic. Usually used to reject an attempt to rate her as a dime.

Yeah, she's tight as hell but she's still flatasstic.

flatasstic by Machete April 11, 2005

Flatassed 

When a girl has no ass.
My sister.

Damn Pablo, have you noticed that my sister is flatassed!

Flatassed by meitesties June 5, 2013