Fauntleroy suit

noun
  1. a formal outfit for a boy composed of a hip-length jacket and knee-length pants, often in black velvet, and a wide, lacy collar and cuffs, usually worn with a broad sash at the waist and sometimes a large, loose bow at the neck, popular in the late 19th century.

Origin of Fauntleroy suit

after the title character of the novel Little Lord Fauntleroy (1886) by F. H. Burnett
Also called Lord Fauntleroy suit, Little Lord Fauntleroy suit.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018