[1] : The Collaborative International Dictionary of English v.0.48

snappy \snap"py\, a.
   snappish. colloq.
   1913 webster

[2] : WordNet (r) 2.0

snappy
     adj 1: tending to speak irritably; "a snappish tone of voice" syn:
             snappish
     2: smart and fashionable; "snappy conversation"; "some sharp
        and whipping lines" syn: whipping
     3: pleasantly cold and invigorating; "crisp clear nights and
        frosty mornings"; "a nipping wind"; "a nippy fall day";
        "snappy weather"; `parky' is a british term syn: crisp,
         frosty, nipping, nippy, parky
     4: marked by smartness in dress and manners; "a dapper young
        man"; "a jaunty red hat" syn: dapper, dashing, jaunty,
         natty, raffish, rakish, smart, spiffy, spruce
     5: quick and energetic; "a brisk walk in the park"; "a lively
        gait"; "a merry chase"; "traveling at a rattling rate"; "a
        snappy pace"; "a spanking breeze" syn: brisk, lively,
         merry, rattling, spanking, zippy
     also: snappiest, snappier
see also:
snappish whipping crisp frosty nipping nippy 
parky dapper dashing jaunty natty 
raffish rakish smart spiffy spruce 
brisk lively merry rattling spanking 
zippy snappiest snappier 

[3] : Moby Thesaurus II by Grady Ward, 1.0

175 moby thesaurus words for "snappy":
   siberian, active, activist, activistic, acute, aggressive, agile,
   algid, alive, animated, arctic, below zero, biting, bitter,
   bitterly cold, bleak, boreal, bouncing, bouncy, breakneck, breezy,
   brisk, brumal, bubbly, burning, chic, chipper, classy, cold,
   cold as charity, cold as death, cold as ice, cold as marble, crisp,
   curried, cutting, dapper, dashing, disagreeable, double-quick,
   dynamic, eagle-winged, ebullient, effervescent, energetic,
   enterprising, enthusiastic, expeditious, express, fashionable,
   fast, fleet, flying, forceful, forcible, fractious, freezing,
   freezing cold, frigid, frisky, full of go, full of life,
   full of pep, galloping, gelid, glacial, go-go, hair-trigger, hasty,
   headlong, hearty, hibernal, hiemal, high-seasoned, hot,
   hot as pepper, huffy, hustling, hyperborean, ice-cold,
   ice-encrusted, icelike, icy, impetuous, incisive, inclement,
   intense, keen, kinetic, light of heel, light-footed, live, lively,
   living, lusty, mercurial, mettlesome, militant, modish, natty,
   nimble, nimble-footed, nipping, nippy, numbing, penetrating,
   peppery, peppy, perky, pert, petulant, piercing, pinching, piquant,
   poignant, precipitate, prompt, quick, quick as lightning,
   quick as thought, quicksilver, racy, rapid, raspy, raw, ready,
   reckless, rigorous, robust, running, seasoned, severe, sharp,
   sleety, slushy, smacking, smart, snappish, spanking, speedy,
   spiced, spicy, spirited, sprightly, spry, stone-cold, strenuous,
   strong, stylish, subzero, supercooled, swank, swift, swish,
   take-charge, take-over, tangy, tony, trenchant, trendy, trig,
   vibrant, vigorous, vivacious, vivid, winged, winterbound,
   winterlike, wintery, wintry, with a kick, zestful, zesty, zingy,
   zippy

[4] : The Free On-line Dictionary of Computing (27 SEP 03)

snappy
     
        snappy video snapshot
     
     
see also:
snappy video snapshot 

Snappy >> S Words
Snappy, definition of term: Snappy
snappy_pag1.html