Top Definition
When a broad is skankily slutty and everybody knows it. Is often sung to the tune of "shake that laffy taffy"
Damn, that chick got wit two dudes this week, she's such a ratty tatty.
(to music) - Tap that ratty tatty, that ratty tatty uh!
Ratty tatty got vagitis.
by Linda yu June 04, 2006
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