Insulting or inflammatory words which tend to cause immediate violence or breach of the peace, and therefore can be prohibited without violating the First Amendment to the U.S. Constitution. Related entries Gag Order Marsh v. State of Alabama Lane v. Franks Manhattan Community Access Corp. v. Halleck Edwards v. Aguillard Papish v. Board of Curators of the University of Missouri Tinker v. Des Moines Independent Community School District Establishment Clause Clear and Present Danger Doctrine Clear and Present Danger Doctrine