Fighting words are spoken words intended to provoke a retaliatory act of violence against the speaker. In United States constitutional law, the term describes words that inflict injury or would tend to incite an immediate breach of the peace.

United States

The fighting words doctrine, in United States constitutional law, is a limitation to freedom of speech as protected by the First Amendment to the United States Constitution.

In 1942, the U.S. Supreme Court established the doctrine by a 9–0 decision in Chaplinsky v. New Hampshire.[1] It 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 the prevention and punishment of [which] ... have never been thought to raise any constitutional problem."

Chaplinsky decision

Walter Chaplinsky, a Jehovah's Witness, had purportedly told a New Hampshire town marshal who was attempting to prevent him from preaching that he was "a God damned racketeer" and "a damned fascist" and was arrested. The court upheld the arrest and wrote in its decision that: