Sarcasm
Sarcasm is the making of remarks intended to mock the person referred to (who is normally the person addressed), a situation or thing. It is often used in a humorous manner and expressed through particular vocal intonations. This is often done by simply over-emphasizing the actual statement, or particular words of it. Because it is vocally-oriented, sarcasm is often hard to pick up in written messages.
The word comes from the Late Latin word, sarcasmus, which, in turn, comes from the Greek sarkasmos, from sarkazein - to bite the lips in rage,- from sarx, sark-, flesh.