The term 'FLAT SCOTTISH HAT' is a reference to the traditional headwear of Scotland, known as a TAM o' Shanter. The TAM o' Shanter is a flat-crowned, round-brimmed bonnet that is usually made of wool and is traditionally worn by men. It is often seen in traditional Scottish dress, such as the kilt. The TAM o' Shanter is also the name of a poem by Robert Burns, which tells the story of a man who wears the hat while out drinking with his friends.