The term 'grandiose or flashy' can be summarized by the crossword solution 'SHOWY, ' which is a five-letter word. SHOWY is an adjective that describes something that is ostentatious, extravagant, or overly elaborate. It is often used to describe someone who is trying to draw attention to themselves in a negative way. SHOWY behavior or possessions are usually seen as a sign of insecurity or a lack of taste.