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1.
Unable to get chicks or pussy. Guaranteed to fuck up any chance of getting a woman.

Like water is to a waterproof watch, a pussy-proof man is to pussy.
We were talking to these decent chicks, but as soon as they realized that Darren was so pussy-proof, they walked out on us.

Bro, you never hook-up because you are pussy-proof.
by doosh laroosh May 19, 2010
 
2.
Where a woman shows a man her pussy so he can see the color of the hair on her pussy to prove what her natural hair color is.
Kathy:I'm a natural blonde.
John:Show me pussy proof.
by deep blue 2012 January 02, 2010