Head of Enron: Hey, I fucked over thousands of Enron employees with various fraud and I'm still a rich bastard.
Guy: LMAO
Head of Enron: Yeah, LMAOATWTTB.
Laughing my ass off all the way down the street. This happens when someone says something so funny and you laughs so hard the only thing yo can think of is to run down the street, while still laughing of course.