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Girl with a big Booty. Thick, but firm.

-Used mostly in the Los Angeles, LA region.
"Damn, that gurl's donk is HUGE. She's almost a Sonipha!"

Guy: "Hey, how are you?"
Girl: "I got a Sonipha booty."
Guy: "Oh What?! Dayum, that shit's bangin!"
by TheOneAndOnlyS May 16, 2010