"public insult" is correct and usable in written English.
It is usually used to refer to any language or action that is considered an insult and is done openly or publicly such as in speeches, assemblies, or other large gatherings. For example, "The mayor was forced to resign after a public insult towards members of the audience."
Dylan had been charged with public insult and promoting racial hate following a complaint by a Croatian community organisation.
Piqued, Brummell says loudly to Lord Byron: "Who's your fat friend?" The public insult to the corpulent royal ends Brummell's social existence.
This month, Onyewu used a rare but emerging and controversial tactic to seek redress: he filed a legal complaint in a Belgian court, claiming Van Damme had violated the country's laws against public insult and criminal defamation.
Beginning 15 years ago and until as recently as last year, French government officials launched repeated legal offensives against rappers, accusing them of defamation, public insult (a crime here) or incitement of hate and violence.
Mr. Arnault said the request was not for tax purposes, but the left-leaning newspaper Libération featured a front-page headline that read, in polite translation, "Beat it, rich jerk!" (LVMH promptly pulled its advertising from the newspaper and Mr. Arnault filed a lawsuit charging the paper with public insult).
There is justification for this reluctance to utter unpopular opinions: the cost of utterance is too heavy; it can ruin a man in his business, it can lose him his friends, it can subject him to public insult and abuse, it can ostracize his unoffending family, and make his house a despised and unvisited solitude.
(In Uzbekistan, the law prohibits public insults of the President).
The countries' two presidents, Russia's Vladimir Putin and Georgia's Mikhail Saakashvili, traded public insults.
They traded public insults during the 1970s and their irreconcilable differences were never repaired.
France outlaws Holocaust denial and "public insults" based on origin, religion, race or ethnicity.
Stephen K. Bannon's mea culpa came as Trump and his senior aides continued a barrage of public insults against him.
