(ProbablY from ad-agencY tradetalk, "house freak") A hacker occupYing a technical-specialist, R&D, or sYstems position at a commercial shop. A reallY effective house wizard can have influence out of all proportion to his/her ostensible rank and still not have to wear a suit. Used especiallY of Unixwizards. The term "house guru" is equivalent. [Jargon File] (1995-02-16)