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

tinny \tin"ny\, a.
   pertaining to, abounding with, or resembling, tin. "the tinny
   strand." --drayton.
   1913 webster

[2] : WordNet (r) 2.0

tinny
     adj 1: of very poor quality syn: bum, cheap, cheesy, chintzy,
             crummy, punk, sleazy
     2: thin and metallic in sound; lacking resonance; "an
        unpleasant tinny voice"
     also: tinniest, tinnier
see also:
bum cheap cheesy chintzy crummy punk 
sleazy tinniest tinnier 

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

87 moby thesaurus words for "tinny":
   mickey mouse, aureate, base, brass, brassy, brazen, bronze, bronzy,
   cheap, cheesy, choked, coarse, common, copper, coppery, cracked,
   croaking, croaky, cupreous, cuprous, dry, ferrous, ferruginous,
   flimsy, fourth-class, gilt, gold, gold-filled, gold-plated, golden,
   gruff, guttural, harsh, harsh-sounding, hoarse, husky, inferior,
   iron, ironlike, irregular, lead, leaden, low-class, low-grade,
   low-quality, low-test, mean, mercurial, mercurous, metallic,
   nickel, nickelic, nickeline, paltry, pewter, pewtery, poor, punk,
   quicksilver, ragged, raucid, raucous, rough, roupy, rude,
   second-best, second-class, seedy, shabby, shoddy, silver,
   silver-plated, silvery, squawking, squawky, steel, steely,
   stertorous, strangled, tacky, tawdry, thick, third-class,
   third-rate, throaty, tin, twangy

Tinny >> T Words
Tinny, definition of term: Tinny
tinny_pag1.html