with the sweat of (one's) brow(redirected from with the sweat of their brow)
with the sweat of (one's) brow
Through or because of one's own efforts or hard work. With the sweat of his brow, my father turned a barren, fallow little plot of land into the flourishing farm you see today. This pair of entrepreneurs has created a billion-dollar company with the sweat of their brows.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.