Noun
(attributive) Describing types of fashion, hairstyles etc. associated with the foppish Lord Dundreary in Taylor's Our American Cousin. [from 19th c.]
(obsolete) A person reminiscent of Lord Dundreary; a fop, a dandy. [19th–20th c.]
(in the plural) Long, bushy sideburns. [from 19th c.]
Synonym: Piccadilly weepers