A card game used to test the potency of your marijuana. The more difficult it seems, the stronger the weed.
Stoner1: "Stoner Concentration is played like regular Concentration, only the cards are dealt face up. You have to turn two cards over and find a match."

StraightPerson: "But that's crazy!!! You're only matching the backs, and all the backs are the sa...."

Stoner2: "Cool, man. Blaze one up and deal!!!"
by Giacomojones March 8, 2017
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