To make a false or reckless statement that is likely to cause immediate panic or harm; used as an example of speech that may be restricted because it poses a clear and present danger.
To intentionally create an alarm or incitement to chaos in a populated place, thereby endangering others.
2.
globalinformalidiomatic
To utter or provoke a warning that will cause undue alarm or disorder; used metaphorically to describe speech that irresponsibly creates panic or serious consequences.
Examples:
EN: You can't shout fire in a crowded theater.
ES: No puedes gritar "fuego" en un teatro repleto.
EN: Free speech is not an absolute. You know that. You can't shout fire in a crowded theater.