Top Definition
A rather outspoken individual who likes to broadcast their opinions to the world on the back of their vehicle. They achieve this through the medium of bumper stickers which tend to cover ninety percent or more of their vehicles' backside. They tend to drive the following cars: the Toyota Prius, a Chrysler minivan, or any pickup truck made by GM. In addition to this they do not know the correct use of the passing lane on the highway.
As soon as I saw that bumper buster pull out in front of I decided to move two lanes over.
by JazzDemon November 15, 2011

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