To bang someone from behind in a repetitous "putt-putt" motion that resembles the sound of an idling motorboat.
by Headcaver December 28, 2007
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The act of inhaling smoke and proceeding to motorboat breasts while exhaling.
He motor boated her last night with smoke like a broken motorboat
by Dr. Krieger June 05, 2013
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The act of placing one's face in the butt crack of another person, followed by rigorous side-to-side motion of the head accompanied by the vibrating of the lips causing a sound similar to an outboard motor. See Motorboating
Do know if he can backwards motorboat himself?

No, I've been doing it for him for the past few months. He's just not that flexible anymore.
by 'ice' June 08, 2009
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When one sexual partner adds salt to their respective partner's nipples, places a shot of quality tequila between the nipples, and puts a wedge of lime in their partners mouth. The 1st sexual partner then proceeds to lick the salt off of each nipple, take the shot of tequila, and suck the lime without using any hands.
Ted: Jill, you know I love you and I've always cared about you.
Jill: You know I feel the same way about you. *She blushes and covers her face*

Ted: *Ted exhales as he musters up the courage* Babe I can’t imagine doing this with anyone but you. I want you to be my first.
Jill: Your first what?
Ted: Mexican motorboat. *As he pours a shot of Jose Cuervo*
by Big Dick Swag January 14, 2015
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The act of vomiting onto a woman's or a rather gynecomastic gentleman's chest whilst imitating the sound of a motorboat by blowing air through closed lips.
Icculus, after a rather sumptuous feast, gave Septiva a hearty roman motorboat betwixt her lovely cassava melons.
by *samIam* January 03, 2008
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to bend a females legs up by her head and then motorboat her vagina
i motorboated your sister last night,

oh yeah, i just finished an oscillating motorboat on your mum
by stowsy ;) May 17, 2011
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Take a warm bowl of milk, drop testicles into bowl, have girl take straw and blow bubbles in milk while executing a handjob.
She's so wild she gave me a French Motorboat...
by JFW April 30, 2004
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