Shamelessly shocking and offensive; audacious; impudent; barefaced; immodest, unblushing.
Sounding harsh and loud, like brass cymbals or brass instruments.
Generally followed by out or through: to carry through in a brazen manner; to act boldly despite embarrassment, risk, etc.
To turn a brass color.
Going beyond what is right, proper, or appropriate because of an excess of self-confidence or arrogance.