Who invented the hat?
Jehoshaphat. Jehoshaphat was the King the Israel and wanted a thing to wear on his head. He took the last three letters of his name and called it that is what he called his hat that he made.
The fedora was invented around 1889. The word fedora comes from a play by Victorien Sardou, Fédora. Sarah Bernhardt was in the play, playing Princess Fédora. She wore a hat very similar to the modern fedora; it inspired the real fedora that is a part of today's fashion. It is not known exactly who designed the fedora hat, only that it was based on the hat worn in this play. Read more: Who invented the…
Generall, "At the drop of a hat" means that someone/something can react or happen as quickly as someone dropping their hat. ie: Jessica can start crying at the drop of a hat. This term originated in sports - before they invented starting guns, the race or event would start when the official held their hat in an outstretched arm and suddenly lowered the arm straight down. That was called "dropping" the hat.