1 definition by Moore's Whore

Acronym for, Bitch You're Stupid!

B.Y.F.S can also be used, which as you can guess stands for Bitch You're Fucking Stupid!
or
Y.S.F.B which stands for, You Stupid Fucking Bitch!
All endearments in The Moore household! <3 ;)
Girlfriend, "I know you weren't really at community service!"
Boyfriends response, "B.Y.S!"
by Moore's Whore August 14, 2014
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