• Despite himself, the professor smiles at the young effrontery before him.

The lawyer had the effrontery to speak before the judge. It means very bold and rude behavior.

nerve, gall

A person demonstrates effrontery by showing boldness or audacity, often in a disrespectful or arrogant manner. This can be displayed through actions such as speaking out of turn, invading personal boundaries, or disregarding social norms without consideration for others.

Chutzpah is absolute cheek, nerve, effrontery. It is a Yiddish word, I believe.