shot across the bow

The phrase "shot across the bow" refers to a warning or threat that is sent to someone to show disapproval or to indicate a forthcoming conflict or confrontation. It is derived from naval warfare, where a warning shot would be fired across the front part of a ship, known as the bow, as a signal to enforce compliance or as a prelude to hostile action. In a figurative sense, the phrase can be applied to any situation where a strong or assertive message is given as a precursor to more serious actions or consequences.