Top definition
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
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug