1: The sound an ATV or other small gasoline propelled vehicle (usually a snowmobile) makes
2 (usage): Usually sounded off in hallways or public places, meant to draw attention to the fact that snowbobilign season has arrived or will soon begin.
Trav's mom: *sigh*
Principal: TRAVIS GET TO CLASS
Trav: (turns into random classroom) Brrrrrrrrraaaaaaaaaap