effrontery

1. (uncountable) Insolent and shameless audacity.Examples: "We even had the effrontery to suggest that he should leave the country."; "Let not the Englishman in Scotland believe that the undoffed hat, the curt reply, the apparent assumption of equality, all spring from deliberate effrontery, and are wholly beyond the reach of southern influence."uncountable

2. (countable) An act of insolent and shameless audacity.Examples: "Any refusal to salute the president shall be counted as an effrontery."; "All was going as planned until the bag hit a snag and failed to surround the entire nest. This effrontery was too much. The wasps exploded off the nest at me."countable