An emphatic American slang term meaning unabashedly bold, brash, or impudent — someone who acts with total disregard for what others think and pushes forward with maximum confidence bordering on nerve. Boldacious blends 'bold' and 'audacious', giving you a word that captures both the brazenness and the sheer scale of someone's unfiltered behavior. It has a Southern and rural American flavor, used admiringly or critically depending on tone.
She had the boldacious nerve to show up an hour late and then ask if there was any food left.
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(US) brazen, impudent, unrestrained.
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