Kermit informs me it was "3ur4zn".
Jesus. Mine was originally -ARNIE- back in 2007. I played a lot of counterstrike so I thought the dashes added personality, as did the all caps. I quickly rectified my error when I realised I looked a tool.
But still, at least the train of thought is there for all to see with mine; '3ur4zn' sounds like the passcode to Wilbury's porn cave.