Leosis is a term used in competitions to mean when one person is up against someone else and knocks them the fuck out with one hit. It can be used as a synonym for Falcon Punch.
Related terms: Leosis-ing, Leosis'd, Falcon Leosis.
"Yo you see what she did there? She LEOSIS'd the competition!"

Guy 1: "Are you pumped for your fight tonight?"
Guy 2: "Yeah man, I'm gonna Falcon Leosis that shit."
by Border Runner December 19, 2010
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1. In the morning your pants are too small and in the afternoon their falling down.
I have small-waist-in-the-afternoon-leosis my pants are too small in the morning so I did'nt use a belt. Now their falling off.
by tnigs_ganja March 4, 2009
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