The Collaborative International Dictionary of English v.0.48:

Tinselly \Tin"sel*ly\, adv.
   In a showy and cheap manner.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tinselly \Tin"sel*ly\, a.
   Like tinsel; gaudy; showy, but cheap.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tinselly
    adj 1: glittering with gold or silver [syn: clinquant,
           tinseled, tinselly]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "tinselly":
   blinking, blinky, coruscant, coruscating, glimmering, glimmerous,
   glimmery, glistening, glistering, glittering, glittery,
   scintillant, scintillating, scintillescent, shimmering, shimmery,
   spangly, sparkling, twinkling, twinkly