I got no idea what you are thinking. Obviously you are not an Australian. Saying "Imo I think you know why part of the name was deemed offensive."you really need to explain yourself, as in Australia the term is NOT offensive. As for your example I am really dumb struck as to what relationship it has to what I am talking about.
In the UK the second part of the username is often used as a derogatory slur. That's, unfortunately, the most likely reason why you're not able to use it, since the username filter isn't region specific.
