1 definition by follow-my-arrow

1) an impolite driver who tailgates cars in front of them

2) a person who gets uncomfortably close to ones back side, typically while dancing
1) "Stop being a bumper humper. I'm already going 70 mph in a 60."

2) "That bumper humper at the bar almost touched my ass."
by follow-my-arrow February 9, 2015
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