Source : WordNet®

caustic remark
     n : 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"--Johathan Swift [syn: {sarcasm}, {irony}, {satire}]