While going to the toilet, side backwards facing the cistern. When completed, flush the chain and vroom, this gives the impression of being in the mediterranean on a jet ski.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

While sitting in a bathtub or shower filled with 2-3 inches of water, let rip a huge fart and you create a. Jet Ski. If your fart is big enough you can create a rooster tail.

When a girl gets wet and the guy eats her out.

To bury one's face in the breasts of a woman with A cups while making a raspberry. Basically, an attempt to motor boat on a woman breasts that aren't at the size necessary to motor boat.

To proform finger actions in the vaginal region.

Similar to the motorboat....it is where a guy and a girl face eather other then she sits down on the ground in front of him. Next, as he stands over her, she proceeds to "motorboat" his boner and balls with her face.