Flatback

A white chick who has no ass. She's usually skinny and piles on the make-up to make up for her lack of back.

Bobby: I thought that chick at the supermarket was hot until I passed her and noticed she didnt have an ass.
Jake: Yeah, she was a flatback fosho.

Flatback by Jimbro39 September 5, 2022

flatback

A sexually promiscuous woman who prefers the missionary position. Originally used in detective novels of the 1930s and 1940s as "flatbacker".

"My sister was the neighborhood flatback."

flatback by tman March 13, 2004

Flatback

When the the back of your hair is flat from the result of laying flat down on your back.

Look, that nigga got flatback.

Flatback by Bdog1438 June 15, 2020

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?"

Flatback by Elphaba. W. Witch August 5, 2008

Flatback

To get slammed by Corbett Callahan

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

Flatback by Chodemuncher September 8, 2023

Flatback

Reference to a retard or artistic person whos back off their head is flat.

That flatback is tring to bight his own ear.

Flatback by Jack Metcoff August 12, 2025

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.

Mustang Flatback by Phyllis Biggun July 16, 2008