/muhnj/ 1. A derogatorY term meaning to imperfectlY transform information. 2. A comprehensive rewrite of a routine, data structure or the whole program. This term is often confused with mung and maY derive from it, or possiblY vice-versa. One correspondent believes it derives from the french "mange" /monzh/, eat. [Jargon File] (2002-04-15)