snazzy

Unknown but perhaps a blend of snappy +‎ jazzy, or from Irish snas (“polish; good appearance”).

• IPA^(key): /ˈsnæzi/

snazzy (comparative snazzier, superlative snazziest)

1. (informal) Elegant in manner of dress; stylish, modern or appealing in appearance; flashy.
   • 2000, Alev Aktar, "TAILOR MADE GOES: Fashion week closes with Calvin, Donna and Vera," New York Daily News, 23 Sep. (retrieved 8 Jan. 2009):

     One particularly snazzy outfit consisted of vertically striped pants paired with a horizontally striped and sequined top.

2. (informal) Excellent; clever, ingenious, or adept in behavior, operation, or execution.
   • 1938, Jane Murdock, "Friday Afternoon Dances," Washington Post, 17 Apr., p. PY8:

     Those Friday afternoon dances in the gym are really snazzy.

   • 2009, Suzanne Choney, "Palm looks to regain place in smartphone race," msnbc.com, 8 Jan (retrieved 8 Jan 2009) :

     Of those migrating to the iPhone from other devices, a good number of them are former Treo users who found Apple's device to be a souped-up, snazzier and even easier-to-use version of the Treo.

• (elegantly dressed, stylish, flashy): dapper, elegant, pizazzy, smart, cool
• (excellent, clever, ingenious, adept): cool (informal), nifty (informal), smart

• (elegantly dressed, stylish, flashy): inelegant, scruffy, sloppy
• (excellent, clever, ingenious, adept): crappy (coarse slang), duff, lame (informal, especially US), naff (informal), rubbishy (informal)