To exit a moving van or station wagon and attempt to ride on top, as if surfing. Safest when done on roads with soft shoulders and little traffic. The driver may or may not attempt to throw the rider off, depending on the situation and the relationship between driver and rider. Often done on the beaches of Florida, since vehicles are allowed to drive right down on the sand.
He made it a full 38 seconds van surfing before losing his balance and rolling down the windshield at a sudden stop.
by beucephalus March 16, 2011