Blue movie is an expression used to refer to a movie or film of a pornographic nature. While the term was once widely recognized as referring to pornographic films in general, the modern usuage seems to be specific to amateur style adult films primarily used in India, Israel, Sri Lanka, and Nigeria.
More About Blue Movie
The term blue movie finds its origin in Great Britain. The word “blue” is often used to refer to things that are off color or vulgar. One may refer to a comedian as using “blue humor” if they are obscene and violating “blue laws” if they violate obscenity laws.