A flat pussy is one that has been pounded so many times that it could now be conceived as flat. This implies multiple poundings, however, a pussy could be made flat by one very intense pounding.
Man, that cat was run over so many times, that's a flat pussy.
Man, that girl was fucked so hard, that's a flat pussy.
by FlatPussy March 14, 2018
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A pussy without any discernible lips whatsoever.
That chick has got flat boobs, flat ass, I bet she has flat pussy too.
by deimos-dread April 21, 2020
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