Covered or stained with or as if with dirt or other impurities
Her head hurt, and she felt grimy from the night sweats.
She managed to squirm free of his arms for a second and started to scream, but he clamped a grimy hand over her mouth.
The children who crowd these grimy alleys, half-clad and underfed, shrink away from your outstretched hand as if from a blow.
All three were disciples of Erasmus, the great apostle of a new, tolerant, scholarly religion very different from the grimy pedantry of the medieval doctors.
Cleaning - All watches get a little dirty and grimy over time.