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The amount of motorboating you can do to a woman, preferably on a scale of 1 to 10.

A male or female who places their head between a female's breasts and shakes back and forth while humming, producing a sound similar to a motorboat in water.

An engine propelled seafaring vehicle.

the act of placing one's face between a woman's breasts and quickly shaking your head in a "no" like gesture left to right while emulating the sound of a motorboat.

The act of putting one's face between a voluptuous pair of breasts while making a vibrating noise with one's lips and shaking one's head back and forth between breasts, simulating the sound a motorized boat would make upon water.

The act or acts of motor boating/ the art of motor boating.