pelt down (on someone or something)
[for something] to fall down on someone or something hard or in quantity. (Typically rain, hail, sleet, stones, etc.) The rain pelted down on the children as they ran to their school bus. The ashes from the volcanic eruption pelted down on the town, covering the houses in a gray shroud.
pelt someone or something with something
to hit or strike someone or something with something. The citizens pelted Max with rocks. The boys pelted the mad dog with a hail of stones.