Eponysterical posts and comments are ones which are funny in light of the poster's user name. The phenomenon was first(?) described (and the word was coined) in this MetaChat thread, and a list is maintained by scarabic at http://scarabic.net/eponysterical.html
From the Metafilter wiki:
Eponysterical posts and comments are ones which are funny in light of the poster's user name. The phenomenon was first(?) described (and the word was coined) in this MetaChat thread, and a list is maintained by scarabic at http://scarabic.net/eponysterical.html