Top definition
A girl who dates or hooks up like a man.
First person- She can easily have a relationship involving sex but not get attached or any sort of feelings involved.

Second person- I know she has such a penis mentality.
by Prodegius September 28, 2009
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2
When a person thinks like a "guy," but is not a guy. The "spread your seed" mentality and way of life that is usually unconventional, or even unacceptable. Usually an adopted lifestyle by a young woman.
"Like, omg, Paris Hilton has total penis mentality, she's dated everyone, not that she cares to remember them. Just another notch on her..."
by gtrav January 22, 2009
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