spiffy

Etymology

Unknown. Attested in print from 1852 (see quotations below). Compare the noun spiff, attested from 1859, as well as spiffing (1872) and spiffed (1881), suggesting participle forms of a related verb. Compare also spiv (“a smartly-dressed criminal”), attested from the 20th century.

adj

1. (informal) Dapper; fine or neat, especially in style of clothing or other appearance.
   He was “great” (as he expressed it) with the Bloomer who kept the bar where their club was held, and whom he styled “a spiffy girl,” and who had been graciously please to accept of a pair of very Brummagem-looking earings, set with paste diamonds, with which he presented her. 1852, “How Jeremiah Tubbs became engaged in the Irish elections of 1852”, in New Monthly Magazine and Humorist, page 66
   The charming twins came last week, and you should see their clothes. ‘Spiffy’ is the word. 1906 August 26, “Newport News in London”, in The New York Times, page 9

noun

1. (informal) A dapper person.