Semi-true, actually ...

An Australian goes into work each morning and greets the boss, "G'day, Ted!". The boss is puzzled, as his name isn't Ted, but says nothing. After a few years, the Australian leaves the company. At the farewell bash, the boss's curiosity finally get the better of him. He asks, "Why do you keep calling me Ted ? You know that's not my name". The Australian replies, "It's an abbreviation, sport". "Oh, I see. An abbreviation for what, by the way ?" "Shitehead".