It's a MediaWiki default user and script, Grow up people!— User:NXWave, NXWave, MediaWiki default
MediaWiki default was the first User ever, before Chronarion and even Oscar Wilde. Some say MWD is a Wikipede, or a Spork, or a Grue even. This is disputed, as some say that MWD is god himself. This, however, is not true.
Here are some of MWD's most famous quotes, in their original language.
"$1 moved to $2"
"The password you entered is incorrect (or missing). Please try again."
~ MWD on incorrect passwords
~ MWD on Special:Cabal