Answer:
Defamation includes making false and derogatory accusations against someone, either directly or implicitly (innuendo). It includes such statements both when made orally (slander) and in writing (libel).
It is unlawful to publish defamatory statements, so it would be impossible to legally give real examples. However, since it is impossible to defame a fictional character, it would not be defamatory to say that Lord Greystoke was raised by apes, since that would be true, but it would be defamatory to say that he was a cannibal, since that is not only untrue but also derogatory (it would expose him to contempt or ridicule).