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1.
Initialization for: "Laughing so hard I think I peed a little."

Used in text-based communication to make known the advent of laughter induced incontinence. Mostly funny, but also kind of sad.
IM Conversation:

...
Person 1: Oh, so that's why there was a racoon in my car!
Person 2: LSHITIPAL
Person 1: Dude, an LOL would have been enough...
by nerdhunter March 27, 2011