Top Definition
An acronym for the most elusive qualities found in a select few lucky women. Stands for "Small waist, big titties"
Guy 1: That girl Pat is hanging out with is perfect for him.
Guy 2: She'd be perfect for anyone, she has the elusive quality
Guy 1: Oh, you mean she has SWBT. Yea, I agree.
by ravvo December 08, 2012

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