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English definition of “not turn a hair”

not turn a hair

to not show any emotion when you are told something bad or when something bad happens: I was expecting him to be horrified when he heard the cost but he didn't turn a hair.Not showing or feeling emotionsControlling emotions
(Definition of not turn a hair from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Translations of “not turn a hair”

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