Vituperate is defined as to speak meanly about someone or something.
An example of vituperate is to gossip harshly behind someone's back.
To rebuke or criticize harshly or angrily; berate.
To use harshly critical or irate language; rail.
To speak abusively to or about; berate; revile.
Origin of vituperate
From Latin vituperÄtus, perfect passive participle of vituperÅ (“I blame, I censure"), from vitium (“fault, defect") + parÅ (“I furnish, I provide, I contrive").