To make false accusations or levy false charges against a person with the intent to tarnish that person's reputation or standing; to calumniate.
Falsifications or misrepresentations intended to disparage or discredit another.
A false accusation or charge brought to tarnish another's reputation or standing.
To untruthfully speak of another in a belittling, deprecative, slighting manner, either in person or in absentia.
To speak nonsense or to lie.