Merriam-Webster Collegiate Dictionary - sarcastic

 adjective  Date: 1695  1. having the character of sarcasm ~ criticism  2. given to the use of sarcasm ; caustic a ~ critic  • ~ally adverb Synonyms:  ~, satiric, ironic, sardonic mean marked by bitterness and a power or will to cut or sting. ~ implies an intentional inflicting of pain by deriding, taunting, or ridiculing a critic known for his ~ remarks. satiric implies that the intent of the ridiculing is censure and reprobation a satiric look at contemporary society. ironic implies an attempt to be amusing or provocative by saying usually the opposite of what is meant made the ironic observation that the government could always be trusted. sardonic implies scorn, mockery, or derision that is manifested by either verbal or facial expression surveyed the scene with a sardonic smile.