Mine's got to be "Peter the spastic *****" at the moment. The very idea of a spasticated *****phile has me giggling like a schoolgirl every time I see it. What's yours?
David Nalbandians Rancid Dungbox was one of my favourites. Peter the spastic ***** is the best username ever, and very apt for this forum as it represents 82% of the users.
I don't really have one at the moment. I quite fancy changing my name to Moral Turpitude at some point in the future, but I've used up all my name changes.