"a velvet tam-o'-shanter"
Tam o' Shanter
Creative Commons AttributionTam o' Shanter - Credit: istolethtv, Flickr
Tartan Tam o' Shanters
GNU Free Documentation LicenseTartan Tam o' Shanters - Credit: Dr Haggis, Wikimedia Commons

A Tam o' Shanter  is a hat with a tight-fitting headband and a loose, floppy crown. There is often a pompom or tassel at the centre. It is named after a character in a poem by Robert Burns.

Originally worn by Scottish men, and made only in blue, it was subsequently adopted by women and made in all sorts of colours and materials.