Personally, I've always liked "You peasant swain, you whoreson malthorse drudge," from Taming of the Shrew... The Paris Review “Should you deploy ‘whoreson cullionly barber-monger’ at your next bar brawl, you’ll emerge victorious, guaranteed.” The best insults from Shakespeare’s “King Lear”: http://tpr.ly/1iylQTk.