sweat of brow
the sweat of (one's) brow
One's own personal efforts or hard work. It's due to the sweat of my father's brow that a barren, fallow little plot of land was transformed into the flourishing farm you see today. This pair of entrepreneurs has created a billion-dollar company by the sweat of their brows.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
sweat of (one's) brow
Hard work: landscaped the yard by the sweat of my brow.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.