Source : WordNet®

spiffy
     adj : marked by smartness in dress and manners; "a dapper young
           man"; "a jaunty red hat" [syn: {dapper}, {dashing}, {jaunty},
            {natty}, {raffish}, {rakish}, {smart}, {snappy}, {spruce}]
     [also: {spiffiest}, {spiffier}]

Source : Free On-Line Dictionary of Computing

spiffy
     
        /spi'fee/ 1. Said of programs having a pretty, clever, or
        exceptionally well-designed interface. "Have you seen the
        spiffy {X} version of {empire} yet?"  This was common
        mainstream slang during the 1940s.
     
        2. Said sarcastically of a program that is perceived to have
        little more than a flashy interface going for it.  Which
        meaning should be drawn depends delicately on tone of voice
        and context.
     
        [{Jargon File}]