sweat：汗；出汗；流汗；一身汗；繁重的工作；艰苦的劳动；累活儿；艰苦努力。sweat the small stuff：为小事担心；庸人自扰；努力处理小事。

【例句】
As long as your goals are met, dont sweat the small stuff.
只要目标达到，就不要再为小事情烦恼。

You should try to keep an open mind，don’t sweat the small stuff.
你应该尽量保持积极的乐观心态，别为小事情操心。