Top Definition
Performing an action in a nimble, quick, or outrageously fast manner.
Dude 1: What's the world record for the Men's 100-yard dash?
Dude 2: Somewhere near 9 seconds, I think...
Dude 1: Damn, that's usaicious!
by barney1092 October 25, 2009
7 Words related to Usaicious

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