Commonly used to describe a girl with the tits of a 10 year old annorexic male. Can be referenced to as an acronym, meaning "Forever Lacking Any Titties".
Person 1: I gotta say, Emma's pretty hot, I think I'll go for it
Person 2: Are you joking?? She's as flat as the Great Plains!
Alternatively, with the acronym in place...
Person 1: I gotta say, Emma's pretty hot, I think I'll go for it
Person 2: Are you kidding me? She is, and will forever, be F.L.A.T
(The first instance is much more commonly used)
Person 2: Are you joking?? She's as flat as the Great Plains!
Alternatively, with the acronym in place...
Person 1: I gotta say, Emma's pretty hot, I think I'll go for it
Person 2: Are you kidding me? She is, and will forever, be F.L.A.T
(The first instance is much more commonly used)
by E.M.V.J.J December 19, 2017
 Get the Flatmug.
Get the Flatmug. When you stack your balls one by one, placing 5$ Bills in between each ball and a female version of Blanca from street fighter eats it like a sandwich.
Kyle Myers regretted making peace with his consent to a flat bread, when his gf turned into a green skinned orange haired monster.
by Tooly Beam December 27, 2020
 Get the Flat breadmug.
Get the Flat breadmug. by Rabidchimichanga January 23, 2020
 Get the Lookin-flatmug.
Get the Lookin-flatmug. An acronym for a woman lacking in breast size, used by usually men. Usually used as an insult.
It stands for,
Forever
Lacking
Any
Tits
It stands for,
Forever
Lacking
Any
Tits
Adam: Wow, look at Jessie! She looks nice today!
Jacob: Yeah, but she's pretty flat. Not much to work with.
Adam: You're such a dick, you know that?
Jacob: Yeah, but she's pretty flat. Not much to work with.
Adam: You're such a dick, you know that?
by mr_onomatopoeia August 22, 2022
 Get the Flatmug.
Get the Flatmug. A scenic place where the boys could have a “bit on”, whether it’s down, in, on, around or across the flats.Normally a location where you chuck some pots in or go flick some yabby’s.
The big Cambodian woke up dustier than a ceiling fan after a big night and he pissed his swag,could say he had a bit on down the flats.
by Tatto the ferret  November 23, 2023
 Get the Down the flatsmug.
Get the Down the flatsmug. Is the God of Gods. He had a religion named Flats's Witnesses and he control the world with his overpowered rule.
by A Flats's Witnesses September 26, 2018
 Get the Denis Flatsmug.
Get the Denis Flatsmug. A non sexual act involving skin-to-skin contact of two or more taint areas. Contact must produce a smacking sound.
by Vladimir Trickington  December 21, 2017
 Get the flat cakingmug.
Get the flat cakingmug.