Infer the meaning of the following idiom: "It's raining cats and dogs."
The idiom "it's raining cats and dogs" means that it is raining extremely heavily. The phrase does not literally mean that cats and dogs are falling from the sky, but rather it is a figurative expression used to emphasize the intensity of the rainfall.
Complete the following task based on the instruction and optional input provided.### Instruction:
Infer the meaning of the following idiom: "It's raining cats and dogs."

### Output:
The idiom "it's raining cats and dogs" means that it is raining extremely heavily. The phrase does not literally mean that cats and dogs are falling from the sky, but rather it is a figurative expression used to emphasize the intensity of the rainfall.