Definition
Used to describe very heavy rainfall.
滂沱大雨，傾盆大雨
I was planning to go for a walk, but it's raining cats and dogs outside now.
我原本計劃去散步，但外面現在正下著傾盆大雨。
The game had to be postponed because it was raining cats and dogs outside.
比賽不得不延期，因為外面正下著傾盆大雨。
We were stuck inside because it was raining cats and dogs.
我們被困在裡面，因為外面正下著傾盆大雨。