Effrontery (noun)

1. Impudence, boldness or shamelessness in behavior or speech.
2. The act of being disrespectful or rude, especially towards someone in a position of authority.

Origin:

From the french word "effronterie" which means impudent behaviour, derived from "effronter" which means to be bold, impudent or brazen.

Examples:

1. His effrontery in speaking to his boss that way was unacceptable.
2. Her effrontery in interrupting the meeting was surprising.
3. The effrontery of the young man was offensive to everyone present.
4. His effrontery was matched only by his ignorance.
5. The effrontery of the thief was obvious as he brazenly walked out of the store with the stolen goods.