Definition 1.
When a hot girl is given the information to a party and she tells all the guys she knows about it.

Definition 2.
A girl's period.
Definition 1.
Dude 1: So I texted her and 5 minutes later all these dudes started calling me like crazy to go to this party.
Dude 2: You my friend are victim to a terrible biddy leak

Definition 2.
Dude: What the fuck is that on my couch???"
Bitch: I just Biddy Leaked.
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