Sweat out

They developed a tremendous respect for the gravel crunchers after sweating out a few rounds of artillery and observing at painfully close range how rocky a Korean hill can be.

Evidently he placed himself at some risk to help us, I learned later, because he was threatened with dismissal for his unauthorized use of the typesetter. Not long thereafter he set up his own business, Xanadu Graphics, where he could work for us without having to sweat out any repercussions.

I'm going to sweat out fifty more push-ups more before I hit the rack.