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. Lucas: Sam said the Earth is round, nah bitch that shit's flat
Haley: No it fucking isn't, you amoeba
Haley: No it fucking isn't, you amoeba
by Saryniae June 4, 2023
 Get the Flatmug.
Get the Flatmug. by Barbara_Bangkok May 27, 2022
 Get the Flat Upmug.
Get the Flat Upmug. by CAptainlimpdick December 20, 2018
 Get the Flat chopmug.
Get the Flat chopmug. by 902Cold May 4, 2018
 Get the Flatmug.
Get the Flatmug. This is a magical gorilla that got his nose punched off.he drinks bleach and is obese.he shall be known as juan Jose Batista
by Stevenbando  July 16, 2023
 Get the Two toned flat nose gorillamug.
Get the Two toned flat nose gorillamug.