The dialect of slang, or euphemismistic speech used by diplomats and politicians when they want to say something terrible about someone, but don't want to pay the consequences of saying such a terrible thing.
From NY Times, 10/22/05: 'Mr. Bolton, who termed Mr. Mekdad's denials "ridiculous," accused Syria of failing to cooperate with the investigators, which, he said, was "diplospeak for obstruction of justice."'
by Downstrike October 22, 2005