Only Phrases

Meaning
This means to do your work with complete determination and commitment.

Origin
In 1400 this line was printed in Turnament Totenham:
“Ther was gryndulstones in gravy, And mylstones in mawmany.”

The first known citation came in year 1532 in John Frith’s A mirrour or glasse to know thyselfe:
“This Text holdeth their noses so hard to the grindstone, that it clean disfigureth their faces.”