:spiffy: /spi'fee/ adj. 1. Said of programs having a pretty,
clever, or exceptionally well-designed interface. "Have you seen
the spiffy {X} version of {empire} yet?" 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. This word
was common mainstream slang during the 1940s, in a sense close
to 1.
-- The AI Hackers Dictionary