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effrontery

1 ENTRIES FOUND:
effrontery ˈfrʌntəri/ noun
effrontery
ˈfrʌntəri/
noun
Britannica Dictionary definition of EFFRONTERY
[noncount] formal
: a very confident attitude or way of behaving that is shocking or rude : nerve
Effrontery describes the attitude of a person who does something very boldly and without shame even though it is wrong or offensive in some way.