The Collaborative International Dictionary of English v.0.48:

Brassy \Brass"y\, n. [Written also brassie and brassey.]
   (Golf)
   A wooden club soled with brass.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Brassy \Brass"y\, a.
   1. Of or pertaining to brass; having the nature, appearance,
      or hardness, of brass.
      [1913 Webster]

   2. Impudent; impudently bold. [Colloq.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

brassy
    adj 1: resembling the sound of a brass instrument [syn:
           brassy, brasslike]
    2: tastelessly showy; "a flash car"; "a flashy ring"; "garish
       colors"; "a gaudy costume"; "loud sport shirts"; "a
       meretricious yet stylish book"; "tawdry ornaments" [syn:
       brassy, cheap, flash, flashy, garish, gaudy,
       gimcrack, loud, meretricious, tacky, tatty,
       tawdry, trashy]
    3: unrestrained by convention or propriety; "an audacious trick
       to pull"; "a barefaced hypocrite"; "the most bodacious
       display of tourism this side of Anaheim"- Los Angeles Times;
       "bald-faced lies"; "brazen arrogance"; "the modern world with
       its quick material successes and insolent belief in the
       boundless possibilities of progress"- Bertrand Russell [syn:
       audacious, barefaced, bodacious, bald-faced,
       brassy, brazen, brazen-faced, insolent]

Moby Thesaurus II by Grady Ward, 1.0:

229 Moby Thesaurus words for "brassy":
   Titian, adust, affront, arrant, arrogant, auburn, audacious,
   aureate, aweless, barefaced, bay, bay-colored, bayard, beard,
   bell the cat, bite the bullet, blaring, blatant, blatting,
   blustering, boisterous, bold, bold as brass, boldfaced, brash,
   brass, brave, brawling, brazen, brazen out, brazenfaced, bronze,
   bronze-colored, bronzed, bronzy, brownish-red, bumptious, callous,
   calloused, case-hardened, castaneous, challenging, cheeky,
   chestnut, chestnut-brown, choked, clamant, clamorous, clamoursome,
   clanging, clangorous, clattery, coarse, cocky, colorful, confront,
   conscienceless, contemptuous, copper, copper-colored, coppery,
   cracked, croaking, croaky, crude, cupreous, cuprous, daring,
   defiant, defying, derisive, disdainful, disregardful, dissonant,
   dry, exhibitionistic, extravagant, face, face the music, face up,
   face up to, ferrous, ferruginous, flagrant, flamboyant, flaring,
   flashy, flaunting, florid, forward, foxy, fresh, front, garish,
   gaudy, gilt, glaring, gold, gold-filled, gold-plated, golden,
   gorgeous, grating, greatly daring, gruff, guttural, hard, hardened,
   hardhearted, harsh, harsh-sounding, heartless, henna, hoarse,
   hubristic, husky, immodest, impertinent, improvident, imprudent,
   impudent, incautious, indiscreet, indurated, injudicious, insolent,
   inured, iron, ironlike, lead, leaden, liver-brown, liver-colored,
   livid-brown, lost to shame, loud, lurid, mafficking, mahogany,
   meet, meet boldly, meet head-on, mercurial, mercurous,
   meretricious, metallic, nickel, nickelic, nickeline, noiseful,
   noisy, notorious, obdurate, obstreperous, obtrusive, overbold,
   overcareless, overconfident, oversure, overweening, pert, pewter,
   pewtery, quicksilver, rackety, ragged, rash, raucid, raucous,
   reddish-brown, regardless of consequences, rip-roaring, roan,
   rough, roupy, rowdy, rubiginous, rude, rufous, run the gauntlet,
   russet, russety, rust, rust-colored, rusty, saucy, screaming,
   seared, sensational, set at defiance, shameless, shrill, silver,
   silver-plated, silvery, speak out, speak up, spectacular,
   squawking, squawky, stand up to, steel, steely, stertorous,
   strangled, strepitant, strepitous, strident, sunburned, swaggering,
   tawdry, temerarious, terra-cotta, thick, throaty, tin, tinny,
   tumultuous, turbulent, unabashed, unashamed, unblushing, unchary,
   unembarrassed, unmodest, unwary, uproarious, vociferous, vulgar