Using 'defamatory' words can lead to lawsuits. Always make sure your criticisms are factual. His defamatory comment on social media resulted in a court case.
Pro Tip 2/3
Reputation Damage
'Defamatory' involves damaging someone's good name, often unfairly or falsely. The newspaper was sued for publishing defamatory accusations against the celebrity.
Pro Tip 3/3
Subjectivity
What's deemed 'defamatory' can be subjective. Avoid statements that could be interpret as offensive. Even though intended as a joke, the comment was considered defamatory.