Das habe ich dazu gefunden:
According to The New Hacker's Dictionary, munge (pronounced MUHNJ) is (1) a verb, used in a derogatory sense, meaning to imperfectly transform information, or (2) a noun meaning a comprehensive rewrite of a routine, data structure, or the whole program.
The editor of The New Hacker's Dictionary relates munge to mung, a verb meaning to make large-scale changes to a file or to destroy something, accidentally or maliciously. Mung was reported to be an acronym for "Mash until no good." http://whatis.techtarget.com/definition/0,,si...
munge: /muhnj/, vt.
1. [derogatory] To imperfectly transform information.
2. A comprehensive rewrite of a routine, data structure or the whole program.
3. To modify data in some way the speaker doesn't need to go into right now or cannot describe succinctly (compare mumble).
4. To add spamblock to an email address.
This term is often confused with mung, which probably was derived from it. However, it also appears the word munge was in common use in Scotland in the 1940s, and in Yorkshire in the 1950s, as a verb, meaning to munch up into a masticated mess, and as a noun, meaning the result of munging something up (the parallel with the kluge/kludge pair is amusing). The OED reports munge as an archaic verb meaning to wipe (a person's nose).http://catb.org/~esr/jargon/html/M/munge.html
Fazit: Ich halte den Eintrag zwar nicht für falsch, aber für unvollständig.