one who has sex, and bounces so much that her hair starts to flop up and down
Dude, she was a hair flopper.

I'm going to make her hair flop around like crazy tonight.
by Tony Abi October 13, 2006
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when people fuck so hard their hair flies around.
i fuckin her so hard she was a hair flopper
by PrinceLogan522 March 9, 2009
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