Slanderous

[Little_Girl]

Embodying or containing slander; calumnious; as,
slanderous words, speeches, or reports.

[Dianne]

An adjective to mean something [spoken] that is [false] and [malicious].

[Donald Trump]

(of a spoken statement) false and malicious.

[Sommer]

A person who is [so jealous] they will literally say [and do] anything to make them look bad ..even when the person was doing [greater] than they ever had been