Cohen v. California, 403 U.S. 15 (1971), was a United States Supreme Court case dealing with freedom of speech. The Court overturned a man’s conviction for the crime of disturbing the peace for wearing a jacket in the public corridors of a courthouse that displayed the phrase, “Fuck the Draft”.

The First Amendment, as applied through the Fourteenth, prohibits states from making the public display of a single four-letter expletive a criminal offense, without a more specific and compelling reason than a general tendency to disturb the peace. Court of Appeal of California reversed.
https://en.m.wikipedia.org/wiki/Cohen_v._California