as bold as brass

In a brash, arrogant, or pushy manner. Can you believe that new hire went to the boss, as bold as brass, and asked for time off on his first day? That girl walked up, as bold as brass, and pushed her way to the front of the line!

very bold; bold to the point of rudeness. (*Also: as ~.) Lisa marched into the manager's office, bold as brass, and demanded her money back. The tiny kitten, as bold as brass, began eating the dog's food right under the dog's nose.

Shameless, audacious, impudent. For example, No one had invited her to the wedding, but she showed up at the church, bold as brass. This alliterative simile plays on brass meaning "shamelessness." [c. 1700]

If someone does something bold as brass, they do it without being ashamed or embarrassed. Their leader, bold as brass, came improperly dressed, wearing a lounge suit while all the others were wearing black ties. Barry has come into the game bold as brass, brash and businesslike. Note: This expression may be based on an incident that occurred in Britain in 1770, when the newspaper the London Evening Post illegally published a report of Parliamentary proceedings. As a result, the printer was put in prison. The Lord Mayor, Brass Crosby, released him and was punished by being imprisoned himself. There were public protests and Crosby was soon released.

Shameless, impudent. This simile probably has the same source as brazen, which can mean either “made of brass” or “shameless,” “too bold.” The latter is older, dating at least from Shakespeare’s time (“What a brazen-faced varlet art thou!” King Lear, 2.2). The present cliché dates from the late seventeenth or early eighteenth century, although brass alone in the sense of “shameless” is older (sixteenth century). “Can any face of brass hold longer out?” wrote Shakespeare in Love’s Labour’s Lost (5.2), and Thomas Fuller (The Profane State, 1642) wrote still more explicitly, “His face is of brasse, which may be said either ever or never to blush.”