Definition of break sweat or US break a sweat in English:

break sweat (or US break a sweat)

informal Exert oneself physically: they extended their unbeaten run to seven matches and hardly had to break sweat to do it
More example sentences
  • He has certainly struggled to break sweat against the calibre of opponent trying to halt his progress thus far this week.
  • They began against a novice England side at Twickenham and hardly broke sweat in winning 19-3.
  • After half-an-hour he lost Roy Keane, but they still hardly broke sweat as they swept their rivals aside with ease.
See parent entry: sweat

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Word of the day deictic
Pronunciation: ˈdeɪktɪk
adjective
denoting a word whose meaning depends on context...