When you are preforming anal sex and go a little to deep. This deep penetration may cause you to hit a special spot. When this spot is touched she will start defecating everywhere. When this happens you have flipped the switch.
"I was pounding this dumb dingy bitch when I flipped the switch. Shit got rugged."
or
"Dude, shut the fuck up or I'll flip your switch!"
or
"Dude, shut the fuck up or I'll flip your switch!"
by Kranus January 27, 2007

v. To have a sudden and drastic change of heart.
I thought that chick was easy, but she flipped the switch on me and said she's waiting for marraige.
by keyshaw November 24, 2004

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by Robert Appel June 19, 2004
