The term "uncut" (or "uncensored") refers to the version of a film that retains the director's original footage, free from external cuts mandated by censorship boards or commercial considerations. For cinephiles, the uncut version is not just "more footage"; it is the restoration of a film’s true identity.
Whether you're a casual viewer or a hardcore cinephile, watching a movie "uncut" is the closest you can get to sitting in the editing room with the director. It is the story, exactly as it was meant to be told. Science.gov watching r-rated movies: Topics by Science.gov uncut movies