A film that contains graphic sexual content. The use of "blue" to mean lewd or indecent dates from the mid-1800s, though the origin is unclear. A lot of kids at school got in trouble for trading blue films.

A film that is entertaining to watch but is generally not of a very high quality or rich in emotional or intellectual depth. A: "So what film do you want to go see later?" B: "I don't feel like watching anything too heavy or complex—let's just see whatever popcorn film is out."

A film with a very large budget and production value that is meant to provide substantial revenue to the production company. Big blockbusters used to be quite the rare cinematic event, but we've gotten to the point now where there's a tentpole film coming out nearly every weekend of the year.

A phrase used in broadcast journalism during clips of news stories that are to be featured in greater detail later (when a news program airs, traditionally at 11 PM). Although it was once reserved for serious news stories, the phrase is often used now in a joking or sarcastic manner in conversation or news parodies. A five-alarm fire engulfs a historical landmark—film at 11. Ooh, Jill and Megan are fighting again! Film at 11!

A film that has a passionate fan base despite lacking critical acclaim, box office success, and/or mainstream interest. The Rocky Horror Picture Show, The Big Lebowski, and Plan 9 from Outer Space are often cited as examples of cult films. A lot of cult films are considered to be "so bad they're good."

A film that shows the actual murder or death of a person. Although snuff films are illegal, they are still widely circulated on the black market. The death scenes were so realistic that the director and producers were actually arrested at one point for making a snuff film.

To begin to display a film, a thin membrane that can develop on the surface of some things. Ew, don't eat that soup—it's been sitting out so long that it's filmed over.