The term 'tastelessly showy' can be described by the crossword solutions of BRASSY, GARISH, TACKY, GIMCRACK, and GAUDY. All of these words refer to something that is overly flashy and ostentatious, often in a way that is considered to be in bad taste. BRASSY refers to something that is loud and bold, while GARISH implies something that is too bright and colorful. TACKY is used to describe something that is cheap and tasteless, while GIMCRACK is an old-fashioned word for something that is showy but of little value. Finally, GAUDY is used to describe something that is excessively ornate and showy.