Top Definition
a juxtaposition of the words road and masturbation...Def. When you got major boneage at the steering wheel and are jackin it with one hand while fist bumping to techno music with the other, usually culminates in the roadbater busting all over the dashboard...
I just saw harry potter last night and, man that scene where harry and hermoines ghosts we're making out had me roadbating all the way home to eden praire
by yfbeezy December 01, 2010
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