meretricious

like or relating to a prostitute; "meretricious relationships"

tastelessly showy; "a flash car"; "a flashy ring"; "garish colors"; "a gaudy costume"; "loud sport shirts"; "a meretricious yet stylish book"; "tawdry ornaments"

based on pretense; deceptively pleasing; "the gilded and perfumed but inwardly rotten nobility"; "meretricious praise"; "a meretricious argument"