hammering down 

When it's raining rather harshly, making a loud noise and generally being rather wet.

Cor, it's hammering down a bit outside!

hammering down by Dessimat0r_ December 26, 2011

hamming down 

to destroy or overly do something.

Allie was hamming down that bowl of cereal milk!

hamming down by cereal bhaddie January 12, 2019