tam-o'-shanter

noun

1. a cap of Scottish origin, usually made of wool, having a round, flat top that projects all around the head and has a pompon at its center.

noun

1. a Scottish brimless wool cap with a bobble in the centre, usually worn pulled down at one sideAlso called: tam, tammy

n.c.1840, type of bonnet formerly worn by Scottish plowmen, from Tam O’Shanter “Tom of Shanter,” name of hero in a poem of the same name by Robert Burns, written 1790. The woolen cap became fashionable for ladies c.1887.