VITRIOLIC

adj. 25B6; adjective ACRIMONIOUS, rancorous, bitter, caustic, mordant, acerbic, trenchant, virulent, spiteful, savage, venomous, poisonous, malicious, splenetic; nasty, mean, cruel, unkind, harsh, vindictive, scathing, barbed, wounding, sharp, cutting, withering, sarcastic; informal bitchy, catty.