"sarcasm" in the noun sense
1. sarcasm, irony, satire, caustic remark
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"
Source: WordNet® (An amazing lexical database of English)
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