1) His effrontery knew no bounds; he had the audacity to demand a promotion after only a month on the job.

2) The politician's effrontery in making false promises to the public was quickly exposed.

3) She displayed a shocking level of effrontery by inviting herself to a private event she was not invited to.

4) The scam artist's effrontery in trying to convince people that his pyramid scheme was legitimate was alarming.

5) Despite her effrontery, she somehow managed to avoid any consequences for her actions.

6) The student's effrontery in plagiarizing an entire essay was met with swift disciplinary action.

7) I was taken aback by the man's effrontery when he cut in line without apologizing.

8) His effrontery in disregarding safety protocols put the entire team at risk.

9) The thief had the effrontery to return to the scene of the crime to look for more items to steal.

10) Her effrontery in spreading malicious rumors about her coworkers caused tension in the office.