It means the activity of putting one's face between a woman's breasts, and rocking turning one's head rapidly from side to side while making a noise like a motorboat.
"Put your head between her tits and go bbl bbl bbl bbl bbl..."
"I heard Jimmy was motorboating Bella at school
she said it tickled"
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A great way to end an awkward conversation with a girl you don't want to talk to.
"This girl was in my room and I couldn't take it anymore so I motorboated her. After the motorboating she left."
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The act of going down onto a female and making a buzzing sound with you lips.
Bro, last night i moaterboated that girl!
HAHA you motorboating son of a bitch!
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The placement of one's face, specifically the mouth, into the area between a well-endowed woman's breasts, followed by a rapid shaking of the face in a side-to-side motion accompanied by yelling. The resulting sound that is created sounds similar to an outboard boat motor.
Sherry was wearing a low-cut top and Mike approached her and started motorboating in her cleavage.
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a face shaken in boobs, as evidenced in wedding crashers, and in superpoke on facebook
The stripper motorboated Julie.
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The act of making a monotone hum while pinching and moving the cheeks back and forth
We thought Michael was getting lucky in his room, but it turned out he was just motorboating by himself.
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The action of sending an 'Ugg Boot' sailing away in a motorboat for being so sinisterly ugly.
Joan went motorboating after a hopping trip turned ugly in Marks 'n' Spencers.
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