road helmet 

Woman giving head to male driver in a car.

I drove all the way home with my road helmet on.

road helmet by aqhachick September 20, 2004

Roadhelmet 

The act of giving oral sex to the driver of a vehicle.

Nani proceeded to give good roadhelmet as we cruised on down the road.

Roadhelmet by Higbittytoes January 18, 2010