What is loose lips sink ships?

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"Loose Lips Sink Ships" was a prominent American propaganda slogan during World War II. The phrase served as a warning against careless talk that could potentially be overheard by spies or enemies. It emphasized the importance of maintaining secrecy, particularly regarding troop movements, ship deployments, and war-related activities.

The message was conveyed through various media, including posters, pamphlets, and public service announcements. The underlying concern was that seemingly innocent or offhand comments could provide valuable information to the enemy, leading to the loss of lives and resources. The phrase became deeply ingrained in the public consciousness during the war years, contributing to a culture of vigilance and awareness around sensitive information.