Top Definition
Mother Fucking Bitch Ass Cock Sucker
Guy 1: hey, i had sexual intercourse with your mother
Guy 2: you are a MFBACS
Guy 1: a what?
Guy 2: you know
by Sancho89 November 12, 2007
Mother Fucking Bitch Ass Cunt
A person that has done wrong and is a complete asshole who doesn't care about anyone but themselves.
That guy cheated on me, what a MFBAC! Let's kill him.
by Sacojosa April 07, 2009
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