The Men in Black
In popular culture and UFO conspiracy, men in black or MIB are supposed men dressed in black suits who claim to be government agents who harass or threaten witnesses to keep them quiet about what they have seen. It is sometimes implied that they may be aliens themselves.
The term is also frequently used to describe mysterious men working for unknown organizations, as well as various branches of government allegedly designed to protect secrets or perform other strange activities. The term is generic, used for any unusual, threatening or strangely behaved individual whose appearance on the scene can be linked in some fashion with a UFO sighting.
Folklorist James R Lewis compares accounts of men in black with tales of people encountering the Devil and speculates that they can be considered a kind of “psychological drama”.