Flat ass 

A very flat booty. Usally people with one either hate themselves or think that they don't have one.

That girl has such a flat ass!

Flat ass by Darkshadowstorm March 29, 2019

flat ass 

Having no ass or junk in the trunk. Suffering from the vitamin deficiency Noassitol. See Glutius Flatosis.

Heather's flat as was the result of Glutious Flatosis.

flat ass by DzNutz January 20, 2004

flat ass 

Blunt honesty, absolute truth bare of cushioning social niceties

Derives from the impossibility of reassuring a person with insufficiently pleasing buttocks

Q: Do these jeans make my butt look big?
A: Girl, no jeans in the WORLD gonna help THAT flat ass!

flat ass by Kindly Wise October 28, 2005

flat ass 

A twenty-first century version of the secretarial spread, caused by passing long hours planted in front of a computer. Also related to phone ear.

"I have to get a better job. I've spent the entire day just sitting on my flat ass, staring at that stupid screen."

flat ass by Deb1955 October 28, 2005

flat ass 

Of or pertaining to geniune truth. That which is true on the basest level.

I flat ass couldn't afford a doctor.

flat ass by kcardk October 19, 2005

Flat Ass 

Also known as Jeong Yoon oh or Jung Jaehyun. Someone needs to give him cake cause everyone knows that he doesn't have one. Jaehyun is the king of all Flat Asses.

Heres how you would use it

Random person : Whats a Flat Ass?

Czennie : A flat ass is someone without cake also known as Jung Jaehyun.

Flat Ass by sochenle April 3, 2021

flat ass 

A re-working of the expression flat out. Ultimate or distinguished from others by a high concentration of the quality expressed

She is flat ass beautiful

flat ass by morie October 28, 2005