IPA: //ˈflæʃ.i.ər//
KK: /ˈflæʃiər/
More showy or attention-grabbing than something else.
The new car is flashier than the old model.
Comparative: flashier
Superlative: flashiest
Flashier → It is formed from "flash" (from Middle English *flaschen*, meaning to emit light suddenly) and "-ier" (a comparative suffix indicating more). The word "flashier" means more flashy or more showy in appearance.
Think of something that emits light suddenly ('flash') and remember that 'flashier' means it is more showy or bright.