ice water in one's veins

idiom

US, informal
: the ability to remain very calm and controlled in a situation in which other people would become upset or afraid
I can't believe how calm she was the whole time. She must have ice water in her veins.

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“Ice water in one's veins.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ice%20water%20in%20one%27s%20veins. Accessed 27 Feb. 2025.

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