What does Bumper buster mean?

Bumper buster meaning in Urban Dictionary

A rather outspoken individual who wants to broadcast their viewpoints toward world from the straight back of their car. They achieve this through the method of bumper stickers which tend to protect ninety percent or maybe more of their cars' rear. They tend to operate a vehicle here cars: the Toyota Prius, a Chrysler minivan, or any pickup truck made by GM. Additionally they just do not understand the proper utilization of the passing lane on the highway.