Top Definition
The moment when your girlfried goes from being in a wonderful mood into her typical douchebag self. It almost seems as if a switch is triggered inside their heads to make them turn into a miserable cunts.
Tony: "Hey babe. Everything was going great this morning over breakfast at the diner, we had bacon, coffee, and lovely conversation. I couldn't have been happier. How come the minute your friends left and we get into the car you immediately turned on your fucking cunt switch?"

Girl: "Fuck you"

Tony: "Enjoy the scenic walk home, bitch. Get out!"
by The Lucas J March 24, 2010

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