“Loose lips sink ships” is an American English idiom meaning “beware of unguarded talk.” During World War II, “Loose Lips Sink Ships” became a widely recognized slogan aimed at reminding military personnel and civilians alike to avoid discussing sensitive information that could potentially aid the enemy. The slogan was often accompanied by striking posters featuring bold graphics and powerful imagery. One of the most iconic versions of the poster was created by the artist Seymour R. Goff, who worked under the pseudonym “Ess-ar-gee” or “Essargee.” Goff’s poster, commissioned by the War Advertising Council in 1942, featured a menacing submarine lurking beneath the surface of the ocean, while above, a sinking ship served as a stark warning against the dangers of careless talk. The poster’s bold design and straightforward message resonated with the public, effectively conveying the importance of maintaining secrecy during wartime. The “Loose Lips Sink Ships” campaign was part of a broader effort by Allied governments to promote national security and prevent the inadvertent disclosure of classified information. The campaign utilized various media, including posters, radio broadcasts, and propaganda films, to emphasize the potential consequences of indiscreet behavior. Goff’s poster, along with other iterations of the “Loose Lips Sink Ships” slogan, played a significant role in raising awareness about the importance of security measures and fostering a sense of vigilance among the civilian population. The campaign remains an enduring symbol of wartime propaganda and the collective effort to safeguard sensitive information during periods of conflict.