vituperate

Short definition from Wiktionary

Verb

1. 1
   To criticize (someone or something) in an abusive or harsh manner.
2. 2
   To attack (someone or something) with abusive language; to revile, to vilify.
3. 3
   To use abusive or harsh words.

Adjective

1. 1
   Of, characterized by, or relating to abusive or harsh criticism.
2. 2
   Which has been abusively or harshly criticized; also, deserving harsh criticism.