The definition of sarcasm is mocking humor, or the use of irony to make a joke.(noun)
If someone can see you are plainly sick with a cold and they ask how you are feeling and you rudely comment "never better," this is an example ofsarcasm.
See sarcasm in Webster's New World College Dictionary
Origin: LL sarcasmos < Gr sarkasmos < sarkazein, to tear flesh like dogs, speak bitterly < sarx (gen. sarkos), flesh < IE base *twerk-, to cut > Avestan thwarəs-, to cut, whittle
See sarcasm in American Heritage Dictionary 4
Origin: Late Latin sarcasmus
Origin: , from Greek sarkasmos
Origin: , from sarkazein, to bite the lips in rage
Origin: , from sarx, sark-, flesh.
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