Source : Webster's Revised Unabridged Dictionary (1913)

Flashily \Flash"i*ly\, adv.
   In a flashy manner; with empty show.

Source : WordNet®

flashily
     adv 1: in a meretricious manner; "the boat is meretriciously
            decorated" [syn: {meretriciously}]
     2: in a fancy colorful manner; "he dresses rather flamboyantly"
        [syn: {flamboyantly}, {showily}]