v. int. The act of pushing one's face in between two ample breasts, and rocking one's head side to side very rapidly while making a vigorous, lip-vibrating "brrr" sound.

n. The sound produced when doing a motorboat.
Wouldn't you love to see Meatloaf motorboat Barbara Bush?
by Bill ewall March 26, 2004
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To submerge ones face in large breasts and moving your head back and forth, flapping your lips, in turn making a motorboat sound.
I just motorboated Marygrace, I almost suffocated in those funbags but it was superb.
by Urban Dictionary November 27, 2006
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( . )BPBPBPBPBP( . )
The sound of the motorboat between a nice rack! Motorboat
by biteme2 November 19, 2011
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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.
Since she wouldn't give oral sex to me, I motorboate her instead.
by ajs86 February 4, 2009
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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.
friend A: "friend B, i haven't seen you in ages"!
friend B: "friend A you old motorboating son-of-a-bitch! how are you doing"?
by andytheicon April 20, 2009
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a motorboat involves a girl with breasts large enough for a human head to fit between them. The owner of the head then proceeds to blow out of their mouth vibrating their lips. This action will make a sound very similar to a motorboat engine, hence the name.
guy leans into woman's breast and blows very hard...... then you have a motorboat
by houseboyt July 19, 2010
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