So say you see a girl and she is thicc. You can say she is a phatass without being mean or wierd
DAYUM that girl is a phatass
by JIMMYJAMDAMN March 6, 2023
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Wow that girl is a phatass
by Antonio Madara June 24, 2009
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Damn they got some phat ass at this web site bigbootyclub.com
by Maurice November 15, 2003
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"Phatass" is an internet slang term derived from "fat ass," which is used to refer to someone with well-developed or ample buttocks.

Or colloquially used to describe someone who is perceived as socially anxious and acting foolishly.
1. She got that phatass!
2. You're a phatass...
by Radin Happier October 7, 2023
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Someone or something that shows the qualities of being phat.
"that was a phatass film"
by dw March 23, 2003
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A very debilitating state of mind where the person believes that he/she is popular or well liked by people, even though they are morbidly obese and extremely obnoxious. This person will do almost anything to make themselves seem cool to others, which usually ends up making the victim look like a loser. Symptoms include, posting picture of you "smoking weed" (when it is actually your vaporizer, constantly stalking people to "hang out" with them, and being nice to pretty girls and expecting to get laid because of this.
Oh no, it looks like Jimmy has developed Phatass Syndrome and won't stop texting my girl, I guess i'm going to have to beat his ass.
by The Commision69 April 2, 2015
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