Junker car, usually full size Chevrolet/Ford of late 1970's early 1980's vintage. Often with multicolored body panels, and or rust holes through parts of the body. Bumpers may or may not have been replaced with a chunk of wood.
Most often seen in and around Indian reservations being driven by younger native individuals.
Nearly got run off the road last night by a bunch of nuts driving some rez sled down the highway.