not turn a hair Definition in the Cambridge English Dictionary
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Definition of “not turn a hair” - English Dictionary

Definition of "not turn a hair" - British English Dictionary

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not turn a hair

to not show any ​emotion when you are told something ​bad or when something ​badhappens: I was ​expecting him to be ​horrified when he ​heard the ​cost but he didn't turn a ​hair.
(Definition of not turn a hair from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Translations of “not turn a hair”
in Chinese (Simplified) 面不改色,保持镇静…
in Chinese (Traditional) 面不改容,保持鎮靜…
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