The Collaborative International Dictionary of English v.0.48:

Swankie \Swank"ie\, Swanky \Swank"y\, n. [Cf. G. schwank
   flexible, pliant.]
   An active and clever young fellow. [Scot.] --Sir W. Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

swanky
    adj 1: imposingly fashionable and elegant; "a swank apartment"
           [syn: swank, swanky]

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "swanky":
   Babylonian, Corinthian, awe-inspiring, awful, barbaric, braw, chic,
   chichi, classy, clothes-conscious, cosmopolitan, dapper, dashing,
   deluxe, dressed to advantage, dressed to kill, elaborate, elegant,
   exquisite, extravagant, fancy, fashionable, fine, genteel,
   glorious, grand, grandiose, imposing, impressive, jaunty,
   luxurious, magnificent, majestic, natty, neat, nifty, nobby, noble,
   palatial, plush, posh, princely, proud, recherche, ritzy, sharp,
   sleek, smart, smug, snazzy, soigne, soignee, sophisticated, spiffy,
   splendacious, splendid, splendiferous, spruce, stately,
   style-conscious, stylish, sumptuous, superb, superfancy, superfine,
   swank, swell, swish, tricksy, trig, trim, well-dressed,
   well-groomed