Loosely defined as a film so bad it's good.

These films have noticeably ‘bad’ (i.e. technically or artistically inept) qualities, but still manage to be both watchable and enjoyable. Usually these films are low budget B-movies, but can originate from any production background. Many films which perform badly at the box office, or go straight to video or tv, but later become a cult classic can be classified as badfilm.

Sometimes what is "bad" in these films isn't the technical aspects, but rather how much what is presented onscreen differs from the traditional Hollywood aesthetic. Badfilms generally receive a great deal of negative attention from critics which actually draws attention to the film and facilities a cult following.
"You've got to see 'The Evil Dead 2!' It's a classic example of badfilm."

"The childish qualities of Troll 2 are well-liked by badfilm buffs because it is seen to create comedy without the element of treatment from knowing hands."
by Creatrixsblood July 26, 2013
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