A DJ that only plays top 40, or 100, music in a bar and nightclub. The music is not remixed or mashed-up at all, but instead the DJ transfers from one original track to another.
The DJ spins music similar to the single tracks heard on popular day time radio (not remixes), has no or very little creativity with the tracks, and lacks in interacting with the crowd of listeners. Audiences are almost better off listening to a juke box.
If you don't scratch or remix beats, you must be a Juke Box DJ.