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English definition of “brass neck”

brass neck

noun [S or U]   UK informal disapproving
If someone has (a) brass neck, they are extremely confident about themselves and are unable to understand that their behaviour is unacceptable to others: She's got a brass neck to ask for a day off when we're so busy.Saddening, shocking and upsetting
(Definition of brass neck noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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