When a girl is all tits and no ass
"Hey Billie, I've been hitting up Emma a lot lately. You think she's hot?"
"She's upside down thick. Personally I'm a thigh guy but yeah I guess she is."
by Intelligible Lizard June 26, 2018
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A girl with a thin upper body/waist and a thick ass/thighs
Aye girl you upside down thick what's your number
by Blank dream July 3, 2017
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