Source : Free On-Line Dictionary of Computing

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)