To motorboat oneself
Big-Boobed Beryl: "Whoa, I can totally motorbate with these puppies!"

Tiny-Titted Tracy: "What's that you're doing Beryl?"

Big-Boobed Beryl: "You're too small to learn motorbation"

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See motorboat motorbate motorbation motorbated orabation
by louleykrista August 03, 2011
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the act of vigorously shaking one's head between a pair of large breasts while simultaneously performing sexual acts on one's own genitalia
Motorbation is a large part of foreplay between Steve and his well-endowed wife.
by Paully Dizzle December 13, 2010
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