Manos: The Hands of Fate

From HallsWiki

Arguably the worst movie ever made, Manos: The Hands of Fate would probably have been lost forever were it not for the seemingly-masochistic tendencies of the crew from Mystery Science Theater 3000 whose mockery of the film elevated it to cult-favorite status. With terrible acting, awkward scripting, abysmal cinematography, and barely a plot to speak of, there were few bright spots in Manos aside from how hilariously bad it was and the character of Torgo.

Hallsians sometimes reference the film's few quotable moments and most use Manos as the measuring stick for all bad movies that have followed.