irony -
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
irony -
A statement that, when taken in context, may actually mean something different from, or the opposite of what is written literally; the use of words expressing something other than their literal intention, notably as a form of humor.