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The act of putting one's face between two large female breasts and gyrating said face while blowing to make a motorboat sound... this act also requires moving ones hips in a circular motion to create the effect that the penis is a helicopter propeller. Of course this must be done naked.
Derek-Damn bro I would boatercopter the shit out of her... her titties are so big!

Paco-Boatercopter?

Derek-Yeah dude... It's a motorboat and a helicopter simultaniously... The Boatercopter
by DeBo429 December 30, 2011
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