<noun><verb>(to compound-tailgate)
This is when a dumbass/old person in front of you is driving slow, usually going the actual speed limit or below, and you are trying not to tailgate them, when some
douchebag genious behind you thinks it a great idea to tailgate you, hoping that will make the guy in front of you go faster. This usually results in a heated exchange, such as the tap of your breaks, wave of your hand, or spraying of the windshield wipers (my personal favorite).
In the end, you eternally hate
the person behind you because its all their fault.