Sarcasm

A keen, reproachful expression; a satirical remark uttered with some degree of scorn or contempt; a taunt; a gibe; a cutting jest.

witty language used to convey insults or scorn; "he used sarcasm to upset his opponent"; "irony is wasted on the stupid"; "Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own" - Jonathan Swift