| Word | Explanation |
| ICP | Short for Insane Clown Posse |
| Inner City Posse | Insane Clown Posse's first group name, also the Detroit street gang they ran with. |
| Insane Clown Posse | Formed in 1992, and consists of members Violent J and Shaggy 2 Dope. The group spread the word of the Dark Carnival through the Underground, and created their record label Psychopathic Records, as well as Juggalo Championshit Wrestling. They have a large history of hardcore ruthless lyrics. They are mostly known for the face paint and large controversy. |
| ISI | Infamous Superstars Incorporated, Gang consisting of Jamie Madrox, Monoxide Child, Blaze, and others |
