disc + jockey. The disc refers to the shape of the carrier holding the music. Jockey refers to a diminutive of "jock", the Northern English or Scots colloquial equivalent of the first name "John," which is also used generically for "boy, or fellow" (compare "Jack", "Dick"), at least since 1529. So, Disc Jockey / DJ, refers to a young person playing (with discs holding) music. More: https://en.wikipedia.org/wiki/Jockey#Etymology Coined in 1935 by Walter Winchell to describe Martin Block. Appeared in print in Variety in 1941.
Previously also called record man, as in Philip Hamburger, Comment, “Comment,” The New Yorker, August 17, 1946, p. 14.
- A person who conducts a radio program of recorded music combined with talk, news, commercials, weather, etc.
- A person who plays, and sometimes mixes, recorded music at nightclubs, dances, parties, or some other social event; and/or as a backup musician for spoken word, or hip hop performers.