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.
by Jimbro39 September 5, 2022
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When the the back of your hair is flat from the result of laying flat down on your back.
by Bdog1438 June 16, 2020
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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
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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."
by tman March 13, 2004
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1.Past tense of "flatbacking." To have slept (ie sexed) your way through something.

2. To have prostituted your way through something, either by trading for sex or by selling sex for money in order to pay.
"She won't be the first co-ed to have flatbacked her way through college." Ice-T (Law & Order: SVU)
by Country Girl Big City June 20, 2012
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A bitch or bird with no job who sleeps around for money and material things.
Yo! How did Shawty get that Gucci Bag, she don't work even no where?

Ans: Shawty be flatbacking.
by V Double November 8, 2010
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A redneck hooker who lays on her back for a living . To make money
That small town had alot of flatbackers .
by Brandi m dukes July 8, 2017
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