From The on-line hacker Jargon File, version 4.4.2, 22 May 2003

Term used by samurai for the suits who employ them; succinctly expresses an attitude at least as common, though usually better disguised, among other subcultures of hackers. There may be intended reference here to an science fiction story originally published in 1952 but much anthologized since, Mark Clifton's Star, Bright. In it, a super-genius child classifies humans into a very few ‘Brights’ like herself, a huge majority of ‘Stupids’, and a minority of ‘Tweens’, the merely ordinary geniuses.