Top Definition
a girl's excuse for everything.. and it works.
Teacher: Excuse me, why are you late to class?
Girl: I'm on my period.

Boyfriend: Why don't you want to have sex with me?
Girlfriend: I'm on my period.

Bitchy friend: Oh my god why are you eating so much?
Girl: I'm on my period.

etc.
by rayrayg February 10, 2012

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