Phrygian cap

noun2

1. •
   A soft, close-fitting conical cap with the top bent forward, represented in Greek and Roman art as worn by ancient Phrygians, and later associated with the Roman liberty cap.

   • A Phrygian Priapus of Elegant VVorkmanship: The Phrygian Cap pointed and hanging dovvn behind, as our Caps in Dishabille are novv vvorn. — 1699
2. •
   A congenital abnormality of the gall bladder with no pathological significance, caused by a folding at the distal part of the fundus.