Top Definition
1) Laughing Steven's Sexy Ass Off (Can be also laughing anyone's ass off with a name beginning with an S)
3) Used to describe more than normal laughing
4) Better than lol
5) A laugh that hurts your side after so long
Dawn was totally lssao last night during her tickle-fest with Steven, her boyfriend.
by Dawnie December 09, 2006

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