Smart, neat, and well-dressed or well-presented in appearance.
Comes from the early 1900s, possibly from 'spiff,' which meant a sudden turn or clever move. The origin is uncertain, but it became associated with looking sharp and impressive around the 1920s.
The word 'spiffy' exploded in popularity during the Jazz Age and 1920s when young people were rebelling against their parents' old-fashioned style—it was slang for being fashionably cool and put-together.
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