PORK PIE HATS / PORKPIE HATS" A Pork pie hat or Porkpie hat is a felt hat, dating from the middle 19th century, much the same as a fedora, but with a flattened top.
A pork pie hat or porkpie hat is a type of hat made of felt or, less commonly, straw. It is somewhat similar to a Trilby or a fedora, but with a flat top.