A woodie is a type of car, more specifically an early station wagon (US) or estate car/shooting brake (UK), in which the rear portion of the car's bodywork is made of wood. Frequently this wood is visible, since it is covered in a clear finish, either over the entire wooden area or sometimes just on the framework with the interior panels painted.
The vast majority of woodies were produced before the end of the 1950s at which time safety regulations and changing automotive fashions meant the effective end of the style. Woodies were generally not produced by the original car manufacturer, but were third-party conversions of regular vehicles. Some were done by large, reputable coachbuilding firms, while others were built by local carpenters and craftsmen for individual customers.
It is a derivative of the body-on-frame method of car construction. Earlier cars generally had aluminium or steel panels bolted on top of the wood framing. Woodies were originally cheaper because they didn't need these panels and their fitment and painting. So railway stations used them for hackwork of luggage and petty shipments; hence the name, station wagon. The tradition of the woodie remains in the woodgrain decals and plastic beams attached to a structural steel body of many station wagons. These imitations are considered deceitful for the same reasons that modern architects maintain Adolf Loos's statement, "Ornament is Crime."