flapass 

Noun; someone who runs their mouth too much

“Shut the hell up flapass”

flapass by Unrealisticquote October 21, 2022

Flakass 

Somebody who unnecessarily criticizes somebody, everybody, or a small group of people like an asshole for no reason other than being an annoying ass prick.

Person 1: “Jeremy is such a fucking flakass.”
Person 2: “I know right! One time I was trying write an essay and this mf looks at it in 3 seconds and then pulls out a 5 page lecture about how bad it is before I even started writing it!”

Flakass by A human I guess August 28, 2022

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

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

flapasaurus 

One that talks too much. A person that can't shut up. A yapper.

Sharon, why don't you ever shut up? You're such a flapasaurus.

flapasaurus by stek69 July 30, 2009

Flatass fatass 

A fat guy with a flat ass.

Mike Pulaski is a single flatass fatass who keeps eating brisket after brisket. He's gonna be over 300 lbs soon.

Flatass fatass by Solid Mantis October 15, 2017