Bad Boy Bill (born William Renkosik) is a disc jockey (DJ) from Chicago, Illinois, U.S. who plays an assortment of house music.
While only in his teens, Bad Boy Bill began his DJ career in 1985 during the Chicago house music movement of the mid to late 1980s.
Bill's popularity grew out of DJing parties throughout the Chicago metropolitan area, as well as opening for the Hot Mix 5.
Bad Boy Bill also made an uncredited appearance as the club DJ in the opening scene of the 1998 film Blade.
These tapes were distributed out of Bill's car to local Chicago area record shops, flea markets, and DJ gigs.
Bill has been credited with the idea of mass-producing mix tapes unlike before,[clarification needed] and was apparently inspired by Andre Lopez, owner of the Hot Jams record store.