Source : Webster's Revised Unabridged Dictionary (1913)

Flashiness \Flash"i*ness\, n.
   The quality of being flashy.

Source : WordNet®

flashiness
     n : tasteless showiness [syn: {garishness}, {gaudiness}, {loudness},
          {brashness}, {meretriciousness}, {tawdriness}, {glitz}]