Laughing In Real Life for lol is abused and only said when something is amusing or when nothing else can be said. LIRL is used when people really are laughing in real life. It was Invented by THEE Clique and used primarily by them, but it is slowly spreading throughout the internet.
Kali: OMG, WHO PUT LIRL ON URBAN DICTIONARY BEFORE US?
Bob: lirl, that's ironic...
Lexi: stfu, it coulda been one of us, I mean there are a lot of us and we're never on anymore and-
Everybody else: STFU
Ki: thank god...
Callie: I used to be god...
Nikki: don't you think this example is getting kind of long?
Anna: yea k, I end it