When you throw up blood into a girls pussy, often during sexual acts.
Guy 1: I did a reverse period into my girl last night
Guy 2: Are you ok?
Guy 1: I'm currently at the hospital
by Backseat_Driver August 27, 2019
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When you get a bloody nose while eating a girl out.
I was munching this girl’s box and just ended up giving her a reverse period
by megakool May 7, 2022
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