Mrs. Astor's pet horse

Mrs. Astor's pet horse

old-fashioned Someone dressed or decorated very ostentatiously; someone who is particularly pretentious or showy in appearance. The "Mrs. Astor" in the phrase refers to American financier William Astor's wife Caroline, a legendary 19th-century New York City socialite known for her lavish parties. Look at her swanning about in all her furs and jewelry, like Mrs. Astor's pet horse.
See also: horse, pet
Farlex Dictionary of Idioms.
See also:
  • Astor
  • borak
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • a happy bunny
  • a happy camper
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league
  • be in bad with (someone)