'Chavez or choice...'

When the current Spanish Prime Minister, Jos Luis Rodrguez Zapatero, tried to point out that this was not entirely fair and that his predecessor had in fact been democratically elected (and also democratically evicted) Chavez started shouting and screaming.  At this point Juan Carlos lost his regal cool, raised his royal digit and said "Por qu no te callas?" which means "Why don't you shut up?"

Not exactly normal royal language but every now and then I suppose Heads of State are allowed to be irritated and speak plainly.
Since this episode Juan Carlos has become a bit of a hero, not only in Spain but rather wonderfully in Venezuela as well.  The phrase has since become one of the most popular downloadable cellphone ring tones in Spain and has been amusing YouTube viewers all over the world.