Top Definition
An acronym for Crying-Laughing-So-Outrageously. The final tier in the expression of hilarity chain:
1.) haha
2.) lol
3.) rofl
4.) CLSO
CLSO, the only thing left to say after Lolerskatez and Roflewaffles.
by Proffessor Waterbreaker October 22, 2009
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