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1.
An involuntary bodily response to a seriously gross guy coming on to you.

Chick: "OMG, that guy was so gross he made my vagina want to vomit."

Yucky guy: "Hey momma you wanna come back to my place and do it?"
Hot/Not deperate chick: "GROSS, my vagina vomited at the idea of sex with you!"
by Jennfu February 05, 2007
 
2.
secretions that come out of a womans' reproductive organs.
Sally's panties have a crusty brown spot and I don't think it's poop.It must be vagina vomit.
by J.D. DeHart September 09, 2004