It's raining cats and dogs
US /ɪts ˌreɪnɪŋ ˌkæts ənd ˈdɔɡz/
UK /ɪts ˌreɪnɪŋ ˌkæts ənd ˈdɔɡz/

1.
비가 억수같이 오다, 비가 쏟아지다
raining very heavily
:
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I can't go out now, it's raining cats and dogs!
지금 나갈 수 없어, 비가 억수같이 와!
•
We had to cancel the picnic because it was raining cats and dogs.
비가 억수같이 와서 소풍을 취소해야 했어.