Definition of "spiffiest" []

• Superlative form of spiffy: most spiffy. (adjective)

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• "The counter at No. 8 Bear Pond may feature the shiniest, spiffiest, newest La Marzocco, as well as a Rube Goldberg–esque water-filtration system, but the menu, which lists lattes and Americanos, makes no mention of espresso or cappuccino."
• "One of the spiffiest addresses in the city has to be Hillside IV, in Brooklyn's Greenwood Heights neighborhood."
• "American Airlines may be in bankruptcy, but it will soon have the newest, spiffiest fleet in the business."