My username has the dumbest most immature history in existance, while my avatar is the from the most brutal thing ever.
Smon, I was 10, logged onto AOL, at the time my favorite thing ever was Poke'Mon (Like I said, I was 10) so I went with "mon", and I was psyched about the upcoming release of Poke'Mon Gold and Silver, so, GSmon, then I added my age. So I ended up as
GSmon10@aol.com. Time passes, the G and 10 were dropped as more and more people just called me Smon, and so the name stuck, though I've recently been trying to replace with...
BLUDD OCEAN. Taken from the DethKlok movie in Metalocalypse.