The fighting words doctrine, in United States constitutional law, is a limitation to freedom of speech as granted in the First Amendment to the United States Constitution. In its 9-0 decision, Chaplinsky v. New Hampshire (1942), the U.S. Supreme Court established the doctrine and held that "insulting or 'fighting words,' those that by their very utterance inflict injury or tend to incite an immediate breach of the peace" are among the "well-defined and narrowly limited classes of speech [which] the prevention and punishment of...have never been thought to raise any constitutional problem."
I am not a lawyer, but I believe this doctrine has essentially not been enforced in recent memory. The subsequent paragraph to the one you quoted steadily showed it being rejected by those who attempted to bring it before the court in the US.
That is not necessarily true. Commission of verbal assault can land a person in jail. http://en.wikipedia.org/wiki/Fighting_words_doctrine#United_...
The fighting words doctrine, in United States constitutional law, is a limitation to freedom of speech as granted in the First Amendment to the United States Constitution. In its 9-0 decision, Chaplinsky v. New Hampshire (1942), the U.S. Supreme Court established the doctrine and held that "insulting or 'fighting words,' those that by their very utterance inflict injury or tend to incite an immediate breach of the peace" are among the "well-defined and narrowly limited classes of speech [which] the prevention and punishment of...have never been thought to raise any constitutional problem."