A quick definition of defamacast:

Defamacast is when someone says something untrue about another person on TV or radio, which hurts their reputation. This is a type of defamation, which means saying something false that harms someone's reputation. Defamation can be written (called libel) or spoken (called slander). If the statement is about something important to the public, the person who said it must prove it's true or they can get in trouble. Trade defamation is when someone says something false that hurts a business's reputation.