motorboat

Short definition from Wiktionary

Noun

1. 1
   Any vessel driven by an engine (either inboard or outboard), but especially a small one.

Verb

1. 1
   To ride in a motorboat.
2. 2
   To press one's face between (another person's breasts); to press one's face between the breasts of (another person) and shake ones head, hum, or vibrate ones lips, in imitation of a motorboat engine's sound.
3. 3
   To press one's face into or between (something else).
4. 4
   To press (someone's face) into or between (breasts or, by extension, something else); to press one's breasts around (someone's face or head).