Sarcasm is "a sharp, bitter, or cutting expression or remark or taunt. Irony is 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, often in a humorous context.
One definition of “irony” is the contrast between what a character in a movie, play, or novel thinks or says and what the audience knows to be true. So it’s “irony” when the movie audience knows the villain is lurking behind the door as the hero opens it, saying “The bad guy is gone.” But when the villain knocks out the hero and says “Gee, what a smart guy,” that’s “sarcasm.”
