term:

Fighting Words

fighting words n pl

: words which by their very utterance are likely to inflict harm on or provoke a breach of the peace by the average person to whom they are directed NOTE: Fighting words are not protected speech under the First Amendment to the U.S. Constitution.

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.