ruptured duck
n.— «Heinen pointed out a 3-cent stamp featuring the medal given to all service members who had been honorably discharged. For unknown reasons, he said, the eagle on the medal depicted on the stamp came to be called “the ruptured duck.”» —“Putting their stamp on the world” by Chris Bergeron MetroWest Daily News (Framingham, Mass.) Apr. 7, 2005. (source: Double-Tongued Dictionary)