munge /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)