This World War II slogan urging sailors and others not to talk about war-related matters may
have first been "This slip of a lip may sink a ship," and was also advertised on
posters as 'slipped lips sink ships" and "idle gossip sinks ships." But the
slogan was best known in the form of Loose lips sink ships. A chewing
gum company coined the slogan "don't talk, chum. Chew Topps gum."