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The "Motorcycle Grip" is achieved by placing your thumb in the anus of a willing recipient (male or female...whatever turns you on), curling your fingers as if gripping your hand around motorcycle handles, and moving your thumb back and forth while making the sound of a motorcycle (I.E., Vroom Vroom, Screeeeech, or rrrrrng rrrrrng). If you find yourself able to perform this simultaneously on two willing participants then you are now performing the American Chopper.
Man I had that bitch on all fours last night and she squeeled like a little piggie when I dropped the Motorcycle Grip on her ass!
by Dirk Stronghold April 30, 2008
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