look up any word, like donkey punch:
 
1.
Stands for Laughing my F*cking ass off big time
Me: hey did you see that biatch picking her nose, I thought she was gonna pull out her brain?

Friend: Yeah, I was LMFAOBT at her, she was a dumb ass, so her brain would have come out easily through her nose.
by paulusthewalrus June 17, 2010