DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   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)