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A Prairie-Masker is when a girl gives a blowjob while she has an Alka-seltzer tablet and some water in her mouth. The definition was coined abord U.S Naval submarines, named after the Prairie-Masker anti-sonar detection device employed by submarines. The Prairie-Masker anti-sonar system works, in a nutshell, by creating a barrier of bubbles around the ship thus reducing noise and detection by hostile sonar devices.
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