Definition of break a sweat
US
: to begin to sweat
He started running and soon broke a sweat. He loaded all five boxes without breaking a sweat.
—often used figuratively to say that something is not hard for someone to do He gave a perfect performance and didn't break a sweat.
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“Break a sweat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/break%20a%20sweat. Accessed 20 Sep. 2021.
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