An acronym for Fuck Buddy With Benifits. (fa-booie-booie)
A term used to describe a partner who satisfies one's sexual needs and has the benifit of some emotional connection. But not quite a girlfiend. To a Fuck Buddy what a friend is to a friend with benifits.
My roommate is fucking this chic. He refuses to call her a girlfriend, but to him, she's more than a Fuck Buddy, we're left with fbwb.