They were called Wips when bikers were called Greasers, and youth called Gassers would purchase cars from the Thirties and Forties and put 1950's or later OHV engines in them that had considerably more power, and gave the extra benefit of the newer transmissions which had more than two speeds. It meant "work in progress" as these vehicles were often cobbled together with handmade alterations and parts from various donor vehicles. The term was not used for any or all cars, but rather something modified, enhanced, or built by the owner. It is no more whip affiliated to urban culture than it is to that DEVO song whip it. You can whip your hair back and forth like a child coming up with observations about whipping coach horses, or "whipping" "zooming" around and "swooshing". Although it may be imaginative and make sense to you and a six year old, that she-ut is ridiculous and retarded.