not turn a hair
idiom
informal
: to remain calm even though something frightening or shocking has happened
Most people would have been very nervous in that situation, but she never turned a hair.
Cite this Entry
“Not turn a hair.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/not%20turn%20a%20hair. Accessed 31 Oct. 2025.
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Merriam-Webster unabridged
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