Can be used in conjunction with other laughing acronyms such as lol and rofl ie. hahahahlololololroflmao!!!!1 and so on..
Used when the situation is considered funnier than a mere lol.
I've also heard this said aloud in conversation pronounced: La mayo. Also roflmao (pronounced rofl like waffle mayo) and of course lol.
"Laughing My Ass Off". Used online to show you find something really funny or are laughing at it alot. Starting to be used in real life when they find something "El-EM-AE-OH!".
Angela: LMAO! No way..
Teddy-" Ok, its when the girl is giving the guy a ...(explains in EXTREME detailwhich is like the teddyi know)
Holden, Mike, Dallas, Ray, Kyle( the group)-" LMAO!!!! HAHAHA OMG HA"