Hey P...just cuz I'm Mr. Helpful today...I looked it up for you.
Main Entry: sar·casm
Etymology: French or Late Latin; French sarcasme, from Late Latin sarcasmos, from Greek sarkasmos, from sarkazein to tear flesh, bite the lips in rage, sneer, from sark-, sarx flesh; probably akin to Avestan thwar&s- to cut
1 : a sharp and often satirical or ironic utterance designed to cut or give pain <tired of continual sarcasms>
2 a : a mode of satirical wit depending for its effect on bitter, caustic, and often ironic language that is usually directed against an individual b : the use or language of sarcasm <this is no time to indulge in sarcasm>
synonym see WIT