A phrase uttered when someone or something does something different from normal customs or that it fails to work properly considering it's use.
Reginald: Well, does it seem to be "righty loosey, lefty tighty"?
Jack: Of course, it must be European.
Reginald: I have to go Jack, I have to catch the 3:15 autobus to Bowling Green and help my constable friend to load lifts on a lorry and relax with some Earl Grey and crumpets.
Jack: Right...now YOU must be European
Reginald: No, I said that for the fun of it.