When you hit somebody’s back with your hand cupped and it make a loud ass noice
*hit back* **smackin sound** damnnnn juicy back(fat back) ass
by Fatbackass May 13, 2019
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A person with a giant back, but an incredibly small penis. To make up for insecurities resulting from a case of babydick, a fat back will overcompensate and take advantage of any oppurtunity to brag about his or her hugeness, back or otherwise.
When everyone started talking about their penises, Mike the Fat Back quickly changed the conversation: "I'm the only one who can get this tattoo 'cause my back's so big"
by xchgsjhkd November 24, 2010
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1. The fat off of a swines back 2. A Fat & Wealthy Greedy Fucker/Person.
See the works/writing's of the late-great Hunter. S. Thompson(In his words as-well "The fat is in the Fire")

We'll show these Fat-Backs a lesson
by These_Goddamned_Animals January 21, 2010
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Another name for an extra-wide pickup truck with dual rear tires.
"Why do Alex and all his friends drive fat back trucks?"

"Your mom drives a fat back and she has a greasy mullet."
by Tim Jerome February 20, 2008
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Originating in the Eastern most northern point of Pennsylvania. Term used to describe a person with excess skin on back of the neck.
That’s why I’m taking you for support you fat back bitch.
by Eddy T December 6, 2022
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The process of having sexual intercourse with the vertical canal that results from squeezing together rolls of fat and/or loose skin on an obese woman's back.
My 300lb girlfriend wants to stay a virgin so she lets me give her a Mississippi Fat Back and spooge in her perm.
by murd3rfun July 28, 2010
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