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The act of being high on marijuana, using the delivery method of your choosing, while playing any version of the video game Halo. It is a technique employed by advanced players of the game, to increase skill, focus, and enjoyment. Highly recommended by some.
Cool guy #1: "Hey buddy, up for a little smalo action?"
Cool guy #2: "... already halfway there, buddy"
by uhhNOTHIN August 24, 2006
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