Noun
a felt hat that is round and hard with a narrow brim
Source: WordNetI thought I would dress in baggy pants, big shoes, a cane and a derby hat. everything a contradiction: the pants baggy, the coat tight, the hat small and the shoes large. Charlie Chaplin
That is why, no matter how desperate the predicament is, I am always very much in earnest about clutching my cane, straightening my derby hat and fixing my tie, even though I have just landed on my head. Charlie Chaplin