Whoopee cap

A whoopee cap is a style of headwear popular among youths in the mid-20th century in the United States. It was often made from a man's felt fedora hat with the brim trimmed with a scalloped cut and turned up. In the 1920s and 1930s, such caps usually indicated the wearer was a mechanic.[1] The headwear can often be seen worn in the films of the Dead End Kids. It is also referred to as a Jughead hat (so named after comic book character Jughead Jones, for whom such a hat was a trademark), palookaville cap, devils cap, clubhouse hat, dink cap, rat cap, or Kingpin.

George Lindsey as Goober Pyle wearing a typical whoopee cap