lolfmao is a very epic word made by coop.
it stands for:
laughing outrageously loud fuppin mouth annoyingly obnoxious.
it's basically a very exaggerated word for lol/lmao
Laugh out loud my fucking ass off, or laugh out laughing my fucking ass off. A combination of Laugh out loud (LOL), and Laugh my fucking ass off (LOLMFAO). Can be used to describe extremely funny things or the sense that you find something funny.