Flatback

Someone who has a flatback as a result of laying on their back too much. Who are of a promiscious nature. Or simply, a female who is a sloppy, loose, trollup.

"man, that Deanna, she is such a flat back, I have seen her with 3 different guys this week!"

or

"Wow, why is he dating that flatback whore?"

by Elphaba. W. Witch July 12, 2008

Flatbacker

A male that is too lazy to have intercourse any other way besides flat on his back

Once men turn a certain age they become “flatbackers “ ...

by Fat rabbit June 29, 2019

Mustang Flatback

The act of having sex in the back seat of a Ford Mustang

Me and my girlfriend went cruising, and ended up doing a Mustang Flatback.

by Phyllis Biggun January 26, 2006

Flatback

To get slammed by Corbett Callahan

Person 1: holy shit he just flatbacked that state trooper
Person 2: yeah, that’s Corbett Callahan

by Chodemuncher September 08, 2023

Virginia Flatback

Another Term For Vagina

That girl had some of the best virginia flatback i ever had!

by Major.horsecock December 22, 2023

Flatbacker

Some lady who thinks its ok to make her way on her life path while being flat on her back, giving up what's between her legs, in order to get there.

I can't believe how that chick sits back and gets paid, is given a car, and she is just a foul flatbacker!

by AshKraft August 11, 2021