Bumper Stab 

When you bump into somebody in a bumper car and stab them at the same time.

Jim: "Hey I just bumper stabbed that guy!"

Bob: "Right on! Get him again next time he comes by!"

Bumper Stab by mdeeeeeeeeeeeee June 1, 2012

bumperstalker

A more stigmatizing descriptor than tailgater.

I would have enjoyed the drive without that bumperstalker.

bumperstalker by Detroit Tigers fan November 28, 2013