Radical Dreamer wrote:It's a ***** joke, apparently. I don't know how it originated or why it has anything to do with that character in particular, but "Anonymous" is often connected with *****, so that's probably what it is.
Taken from lurkmore's *chan encyclopedia (DO NOT under ANY circumstance go to lurkmore. You've been warned):
A word commonly added to the end of sentences in Japan, means "it is/be/are/am" and so on; it's considered more formal than usual and is mainly used when talking to people you don't know or to a superior. A huge amount of anime characters also use it.
The Desu meme is inspired by Suiseiseki from the anime Rozen Maiden, who says it extremely frequently as a kind of catchphrase; she is often simply called DESU because her name is difficult for some people to spell. DESU is often a spam reply when an unwitting newcomer asks for the definition; this was probably inspired by the Dan Kim web comic where she constantly repeats desu.
It first appeared on ***** in force when /a/ users spammed /b/ in retaliation for a /b/ raid on /a/. It has since waned in popularity after weeks of constant spamming of the forced meme. It was banned on /b/ at one point. Now used often as a spam word during /b/lockades on Habbo.