SARCASTIC

adj. scornful, contumelious, derisive, derisory, ridiculing, bitter, biting, cutting, trenchant, incisive, acrimonious, acerbic, acid, acidic, acidulous, harsh, acrid, aspersive, venomous, poisonous, virulent, spiteful, malicious, malefic, malevolent, satiric(al), ironic(al), cynical, disdainful, mocking, contemptuous, critical, censorious, captious, carping, cavilling, sardonic, scathing, caustic, nasty I don't think he knows how hurtful his sarcastic remarks can be