The story
From the name of Lord Dundreary, a character in Tom Taylor's play Our American Cousin (1858).
First known use, by meaning
- from 19th c. Any type of fashion, hairstyles etc. associated with the foppish Lord Dundreary in Taylor's Our American Cousin.
- 19th–20th c. A person reminiscent of Lord Dundreary; a fop, a dandy.
- from 19th c. Long, bushy sideburns.
Etymology from Wiktionary, CC BY-SA 4.0.