n. Female version of Douche-bag.

A girl so clueless and lost in her own sense of misplaced greatness that she doesn't realize how big a waste of flesh she is.
Paris Hilton is such a "snatch ratchet, " she's famous for the stupid look on her face, brainlessly following every trend, and having no real worth on a human level to anyone except to be the punchline of jokes.
by The New OED October 6, 2009
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Any act that causes a vagina to tighten or clamp down. Can be the result of a Donkey Punch or similar head trauma.
If I slide out of this girls hole one more time, I'm givin her a snatch ratchet.
by moobak August 25, 2004
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