look up any word, like darude - sandstorm:
 
8.
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!
by DGAFinc. December 01, 2006
 
9.
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.
by Kawaii Koneko Ichigo April 06, 2009
 
10.
When a man grabs his penis and sticks it through the crack between a woman's boobs as if he were doing the real thing.
Hey babe look at this! *sticks his wang in and starts shovin and motorboating
by omgtits July 17, 2009