tailgate
Automotive Term
A tailgate is also a part of a vehicle, (in addition to being the nasty driving habit described above). A tailgate is the fold down door on the rear of a truck bed. The rear door of a station wagon is also called a tailgate.
Tailgate theft has become a problem in some areas. Because the tailgates on most older American made trucks are easily removed with few or no tools. I would suggest getting a tailgate lock if you have one of those models. Because replacement tailgates are a little expensive. It is also recommended to get a guard plate for the top lip of your tailgate if you are going to be doing any real work with your truck.