A dandy, an exquisite. DUDINE: A dandizette.

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1883.  The new coined word “dude” … has travelled over the country with a great deal of rapidity since but two months ago it grew into general use in New York.—North Adams (Mass.) Transcript, June 24. (N.E.D.)

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1883.  The elderly club dude may lament the decay of the good old code of honor—a word of which he has a very ludicrous conception.—Harper’s Mag., lxvii. 632/1. (N.E.D.)

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1883.  Not to encourage the development of the dude or dudine.Philadelphia Times, No. 2892. (N.E.D.)

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1888.  If the term “dude” had been invented then [in 1866], it would often have applied to a Texan horseman.—Mrs. Custer, ‘Tenting on the Plains,’ p. 212.

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1891.  Joe then went east, and married a young dudine out there.—A. Welcker, ‘Woolly West,’ p. 69. (N.E.D.)

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