Something that is brassy has a yellow metallic colour and sometimes looks cheap. A woman with big brassy ear-rings
tastelessly showy; "a flash car"; "a flashy ring"; "garish colors"; "a gaudy costume"; "loud sport shirts"; "a meretricious yet stylish book"; "tawdry ornaments"
unrestrained by convention or propriety; "an audacious trick to pull"; "a barefaced hypocrite"; "the most bodacious display of tourism this side of Anaheim"- Los Angeles Times; "bold-faced lies"; "brazen arrogance"; "the modern world with its quick material successes and insolent belief in the boundless possibilities of progress"- Bertrand Russell
disapproval If you describe a woman's appearance or her behaviour as brassy, you think that she does not have good taste, and that she dresses or behaves in a way that is too loud or vulgar. Alec and his brassy blonde wife