Top definition
A person who encourages the act of a motor boat, especially in large social gatherings, as a way of breaking the ice and creating a lively atmosphere.
Hobbit: Hey guys check out Brandon over there motor boating all those chicks!!!

Johhny Long Taint: That guys loves to party - he is definitely a promotor boatist!
by community property June 21, 2010
Happy St. Patties Day!