when a female creature (a woman) goes from absolutely loving the idea of a relationship with whom she deems to be the greatest man she's come across and then suddenly reverses her opinions and becomes a devil woman, pushing the once greatest guy in the world as far away as possible. like a leper.
guy 1: "wtf happened with you and that girl?"
guy 2: "...she flipped her damn lizzy switch!"
guy 1: "oh shit, that's messed up."