An acronym for, laughing my fucking ass off at you, big fat monkey. 1. Used as an insult or 2. just joking around.
1. prson1: I HATE U IM GLAD U TRIPPED AT LUNCH LMFAOUBFM!!!!
2. prson1: LOL! Did you see that person trip at lunch! I was soo like LMFAOUBFM!!!! xD
It is a substitute for the word "bitch".
Guy 1: Did you see that girl whining?
Guy 2: Yeah, she was a real Bob.
1👍 8👎