Exploitation film is a type of film that eschews the expense of "quality" productions in favor of making films on-the-cheap, attracting the public by exciting their more prurient interests. "Exploitation" is the show business term for promotion, and an exploitation film is one which relies heavily on the lurid advertising of its contents, rather than the intrinsic quality of the film.
Exploitation films feature forbidden sex, wanton violence, drug use, nudity, freaks, gore, monsters, destruction, rebellion and mayhem. Such films have existed since the earliest days of moviemaking, but they were popularized in the 1960s with the general relaxing of cinematic taboos in the U.S. and Europe. Since the 1990s, this genre has also received attention from academic circles, where it is sometimes called paracinema.
Ephraim Katz, author of The Film Encyclopedia, has defined exploitation as:
Films made with little or no attention to quality or artistic merit but with an eye to a quick profit, usually via high-pressure sales and promotion techniques emphasizing some sensational aspect of the product