You could try saying, "Glarb!" It confuses most people.
(Now I'm really leaving!)
Or GUBU... coined by Conor Cruise O'Brien after Charlie Haughey said "grotesque, unbelieveable, bizarre and unprecedented", which was his reaction after Ireland's most notorious (non-IRA) serial killer, Malcolm MacArthur, was found in the house of the Attorney General... it's a long story, I don't feel like going into detail...
:)