What is example of protected and unprotected speech?

The Courts have ruled over time that most, but not all, speech is protected by the Court system. The unprotected forms of speech are generally * sedition (presenting a clear threat to overthrow the government), * obscenity (mostly just hard-core or child porn) * "fighting Words," (those which incite a hostile reaction) * defamation (slander or libel against a public figure), * some commercial speech (what businesses advertise, etc) (taken from RiOSalado Online, POS222 American Constitution)