What's on your mug?

An engine propelled seafaring vehicle.

What a nice day for motorboating.

By Jersey_Guido

The act of putting one's face between a voluptuous pair of breasts while making a vibrating noise with one's lips and shaking one's head back and forth between breasts, simulating the sound a motorized boat would make upon water.

That chick's boobs are totally motorboatable.

By J No.5

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

The act of placing ones head between breasts and doing a "raspberry".

John - "Man, Mary's tits were so nice, I just Motorboat (ed) the shit out of them!"

By ale x

Verb: to move quickly or with urgency. Similar in usage to the Spanish word, "vamonos."

Motorboat people! We're gonna be late!

By Bb dre