Re: Nerf bars??
Obviously the term has undergone a change in definition over the years. In the '50s and '60s, it referred to pushing someone else's car with your car, usually to start it. "My car won't start." "I'll nerf you."
Urban dictionary has 23 definitions, none having anything to do with pushing (well, drugs maybe). Wikipedia thinks the term originates with Nerf balls and other squishy toys.
Official definition: A nerf bar is a bar on the front of your vehicle that allows you to push another vehicle without boogering up the front of your vehicle.