LMFAO is stronger than LMAO which is stronger than LOL ROFL (rolling on the floor laughing is somewhere in between LOL and LMFAO

LMFAO = Laughing my fucking ass off LMAO = laughing my ass off Both mean that something is so funny, you're laughing a lot or can't stop laughing! Both are "stronger" versions of LOL, laugh out loud.