A juggalo is a fan of the hip hop group Insane Clown Posse or any other hip hop group signed to Psychopathic Records. Juggalos have developed their own idioms, slang, and characteristics. The Gathering of the Juggalos, alternatively known as just "The Gathering", is a notable annual festival held by juggalos and the artists that they support, which have included rap stars such as Busta Rhymes, Ice Cube, and MC Hammer; over its first eleven events (2000–2010), the festival drew a total attendance of about 107,500 fans, averaging nearly 9,800 per year, with a peak of 20,000 in 2010.

Insane Clown Posse, often abbreviated as ICP, is an American hip hop duo. Formed in Detroit in 1989, ICP's best-known lineup consists of rappers Violent J and Shaggy 2 Dope. Insane Clown Posse performs a style of hardcore hip hop known as horrorcore and is known for its elaborate live performances. The duo has earned two platinum and five gold albums. According to Nielsen SoundScan, the entire catalog of the group had sold 6.5 million units in the United States and Canada as of April 2007. The group has established a dedicated following called Juggalos numbering in the "tens of thousands".