Top Definition
1) female form of "cock blocking" 2) the act of hindering, by whatever means, the chances of another female from getting a sexual encounter with a male.

**Not to be confused with the class of medications used to relieve chest pains, antianginals**
Cindy: can you believe that bitch just took that hott guy away from me?!

Martha: i know!...she just prescribed you an antivaginal.
by di2agon926 March 13, 2010

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