[German FidoNet] German acronym for
Dümmster Anzunehmender User (stupidest imaginable user).
From the engineering-slang GAU for Grösster Anzunehmender
Unfall, worst assumable accident, esp. of a LNG tank farm plant
or something with similarly disastrous consequences. In popular
German, GAU is used only to refer to worst-case nuclear acidents
such as a core meltdown. See cretin, fool, loser
weasel.