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(Zehs-Tee-Ass) A rank, dirty, sweaty, itchy ass; The act of not adequately scrubbing between the crevasses of an ass, resulting in one's hand smelling like taco seasoning when scratching their ass crack.
Girl 1: "What'd you do today?"

Girl 2: "Lots of laundry. I came across a pair of my boyfriend's briefs. They smelled like Zesty Ass."

Girl 1: "Why you be sniffin' his drawers?"
by silvermold November 20, 2011
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