Top Definition
when girls call other girls ugly, fat, etc. just because a guy complimented that other girl (i.e. - she's jealous)
GUY: Dude, that Catholic school girl is so hot... all i wanna do is get her in bed

GIRL: No, she's so ugly...

GUY: BITCH EFFECT!!!

by v8juice December 29, 2008
When a guy pusses out, whines about everything, or let's his girl change his plans and he's okay with it. This diseases is very dangerous and tnere is no cure yet.
Bro His girlfriend wouldn't let him come snowboard and he's okay with it
Man he must have gotten sick with bitch effect
by Bitch effect 101 May 07, 2016
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