Synonyms for Trashy (same or very similar meaning)
WordNet sense 1 (cheap and inferior; of no value):
rubbishyWordNet sense 2 (lacking in usefulness or value):
worthlessWordNet sense 3 (tastelessly showy):
brassy, cheap, flash, flashy, garish, gaudy, gimcrack, loud, meretricious, tacky, tawdry, tattyWordNet sense 4 (lacking aesthetic or social taste):
tastelessFrom the ODE community, based on WordNetadd/edit