BREAK SWEAT
Meaning of BREAK SWEAT in English
( BrE ) ( NAmE break a ˈsweat )
( informal ) to use a lot of physical effort :
He hardly needed to break sweat to reach the final.
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005