From Longman Dictionary of Contemporary Englishvitriolicvit‧ri‧ol‧ic /ˌvɪtriˈɒlɪk◂ $ -ˈɑːlɪk◂/ adjective formal CRUELvitriolic language, writing etc is very cruel and angry towards someone vitriolic remarks
Examples from the Corpus
vitriolic• The press, too, was irresponsible and factional, given to vitriolic personal attacks and political character assassination.• She attacked him in a vitriolic seven-page letter to the newspaper.• There was even a second letter - more vitriolic than the first - and the date she meant to send it.• Where does this vitriolic woman get her information from? 