A judge in America, mr Scalia, recently earned major media attention because he made a gesture. The form: cupping the hand under the chin and flicking the fingers like a backward wave. It was interpreted as ‘Va fan’ culo‘ by the gathered journalists and photograpers. He explained it himself (in a letter) as meaning “I couldn’t care less, no business of mine. Count me out.”
Updates: There’s a Wikipedia entry now, calling it Sicilian. I checked with a guy from Ravenna (north) and he said it’s common in all of Italy. The wiki entry further states that two gestures were mixed up. I think it was only a matter of different interpretations of the same gesture. Elsewhere, the Nation published The Nino Scalia Guide to Sicilian Hand Gestures in mockery.