flat chested 

A woman/girl with very small or no breasts. Usually seen as a curse but some people like the lack of boobs.

Jay: YO MAN that bitch be flat chested
Carol: Damn that's so fucking hot

flat chested by Kona-Chan March 31, 2016

flat chested 

some one who is a part of the "ITTY BITTY TITTY COMITTIY"
in other words, very small breasts.
boobless.

god, that bitch is flat chested.

flat chested by Josh O August 18, 2004

Flat chested 

A girl with no boobs. It’s pretty bad when her ribcage sticks out farther than her boobs.

Mackenzie is REALLY flat chested man. #notits

Flat chested by basicbitchxo August 25, 2019

flat chested 

Flatchestsed,

Very very small boobs or no boobs at all
Any thing less than a C cup

Flat chested,
I'm flatchested,my boobs don't fit this bra!

flat chested by Kayonce January 25, 2017

flat-chested 

having little or no female breast development

She was known in high school as "some flat-chested girl."

flat-chested by Light Joker May 30, 2006

flat-chested 

a women without boobs

did you see that flat-chested girl?

flat-chested by tim March 13, 2003

flat-chested 

A girl with absolutely no boobs who often likes to pack her bra to make it seem different

this chick i know ASHLEY

flat-chested by Martin Lawrence March 19, 2004