chimney-pot hat

plural chimney-pot hats

1. informalA type of cylindrical top hat traditionally worn as formal attire.

   1 more example

   They have a peculiar style of dress which they wear among themselves, a close-fitting white shirt with black trousers, and a black frock or upper shirt. The women seem to prefer a dress entirely black. On festivals and state occasions they adopt the swallow-tail coat, chimney-pot hat, and their accompaniments, displaying all the absurdity of our European fashionable dress.

   1869, Alfred Russel Wallace, The Malay Archipelago, volume I, London: Macmillan and Co., page 471