Object of toil. The burden each man carries when he is taking care of his business.
I keep my head to the grindstone during the day to pay for my lady's shoes and the kids' piano lessons.
But at night I leave that grindstone alone, let the kids practice their lessons in their rooms and let my lady, booty to the bed, lift her heels to show me the fruits of my labor.
Melvin couldn't get a date for the prom because he had to put nose to the grindstone on the shooting range to be selected in the military recruitments next year.
In every Little League, two dads always do the work of 80 volunteers.
Sheila said, "Travis & Chris work the field for every game, even the ones their own kids don't play in!" Bob replied, "They are the Grindstone Cowboys."