The definition of "F.O.H" is a simplified version of the phrase "Fuck Outta Here" Mainly used in Philadelphia "Fuck Outta Here" Means something is not Be-liveable or unreasonable, or just a way to say "Shut up bitch"."Fuck Outta Here" is normally said in a loud rude tone most commonly used with the word nigga at the end.
Friend 1: "yooo i just got the baddest bitch and she looks like your mom."
(friend 2 responds)
Friend 2: "Man F.O.H(Fuck Outta Here) nigga."