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Abbreviation for: you only say YOLO once
Because of how incredibly gay the acronym YOLO is, you're only allowed to say it once in your life. Yosyo however can be said as much as you like. It's a thing.
Guy 1: Dude did you end up setting off those fireworks in your bathroom last night??

Guy 2: Yeah mate, YOSYO!!!
by thomyorkeandtheradioheads January 27, 2013