Calumny
Falsely accusing one, or making false statements such as to ruin the reputation of the person in question.
Slander, Character assassination, Defamation
It is a hobby of the media to spread calumny about celebrities.
It is a hobby of the media to spread calumny about celebrities.
calumnious
(of a statement) false and defamatory; slanderous.
Once Trump stepped down from a political platform, his calumnious speeches provoked baying applause from audiences, he was courteous and considerate even to foreign politicians he had just slandered in the speech