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The uncontrollable act of jerking one's video game controller as if to enable the on-screen character to successfully complete a motion or activity. May also be accompanied by exaggerated body movements and postures.

See also: nintendileptic
You should see my sister play Mario Kart 64. She's leaning all over the place, controller's above her head. Nintendilepsy is so sad.
by tbp April 22, 2010