Pronounced "Fim-
bo" this acronym stands for the common
slang of extremely rigorous and satisfying coitus. Slang terminology is Fuck(ed) My Brains Out. It is phrase more common among the younger male demographic; however it has been known to be used by both the Super Fucking Cool Chick and SLUT demographics of the female
gender.
Present tense: I really wish that my new secretary would FMBO. I'd give her a big
fucking raise if she did.
Past tense: My secretary FMBO'd me last
night. It was fuckin great, I fired her today though cuz she spilled
coffee on my goddamn TPS Report.