brassy UK /ˈbɹɑː.si/US /ˈbɹæs.i/adjective 4noun 1forms 3 adjective4 •Resembling brass.The cup had a brassy color. •Harsh in tone. •(informal) Impudent; impudently bold.Don’t get brassy with me, young lady! •Unfeeling; pitiless. noun1 •Kyphosus vaigiensis, a fish found in southeast Asia. formsbrassies · brassier · brassiest