Laugh My Mother Fucking Ass Off. Similar to "
lmao," or "lmfao," but instead of "Laugh My Ass Off," or "
Laugh My Fucking Ass Off," it adds the impact with "Mother".
Mike: "So the dog walked itself
home, ate a pizza, and took a nap."
Joe: "
LMAO!"
Peter: "LMFAO!"
Scott: "No dudes, LMMFAO."