| 单词 | not turn a hair | 
| 释义 | not turn a hair phraseSee full dictionary entry for  hair If you say that someone faced with a shock or a problem does not turn a hair, you mean that they do not show any surprise or fear, and remain completely calm.   I explained my situation and he didn't turn a hair.   Synonyms: remain calm, keep your cool [slang], not bat an eyelid, keep your hair on [British, informal]    | 
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