pelt down

US /pelt daʊn/
UK /pelt daʊn/
"pelt down" picture
1.

激しく降る, 土砂降りになる

to rain very heavily

:
The rain began to pelt down just as we left the house.
私たちが家を出た途端、雨が激しく降り始めた
We had to take shelter because it was pelting down.
雨が激しく降っていたので、私たちは避難しなければならなかった。