To untruthfully speak of another in a belittling, deprecative, slighting manner, either in person or in absentia.
To speak nonsense or to lie.
To criticize (someone or something) in an abusive or harsh manner.
To use abusive or harsh words.
To attack (someone or something) with abusive language; to revile, to vilify.
Of, characterized by, or relating to abusive or harsh criticism.
Which has been abusively or harshly criticized; also, deserving harsh criticism.