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The art of creasing the open bag of potato chips at the top corner, in order to dump the remnants in your mouth. A maneuver carried out, when in a rush or when trying to speed up the road towards obesity.
Hey, Jimmy John, hurry up and chip funnel those doritos -- we gotta go!

Fat Sam quickly chip funnelled his bag of doritos, so as not to decrease the pace towards downing his mountain dew.
by Poork Rhinds May 10, 2010