One of the mysteries of the English language finally explained.
A toy horse made from plush. Also: the type of something ostentatious, luxurious, etc.; frequently in "dressed (up) like (Mrs) Astor's plush horse" and variants.
Ostentatiously luxurious or extravagant.
Late 19th century; earliest use found in The Boston Globe. From plush + horse.
plush horse/ˌplʌʃ ˈhɔːs/
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