A kludge or kluge () is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain. This term is used in diverse fields such as computer science, aerospace engineering, Internet slang, evolutionary neuroscience, and government.

<jargon> /kluhj/ (From the old Scots "kludgie" meaning an outside toilet) A Scottish engineering term for anything added in an ad hoc (and possibly unhygenic!) manner. At some point during the Second World War, Scottish engineers met Americans and the meaning, spelling and pronunciation of kludge became confused with that of "kluge". The spelling "kludge" was apparently popularised by the "Datamation" cited below which defined it as "An ill-assorted collection of poorly matching parts, forming a distressing whole." The result of this tangled history is a mess; in 1993, many (perhaps even most) hackers pronounce the word /klooj/ but spell it "kludge" (compare the pronunciation drift of mung). Some observers consider this appropriate in view of its meaning. ["How to Design a Kludge", Jackson Granholme, Datamation, February 1962, pp. 30-31]. [Jargon File] (1998-12-09)