Identify the figure of speech used in the following sentence: “It was raining cats and dogs.”
The figure of speech used in the sentence "It was raining cats and dogs." is an idiom. This idiom means that it was raining very heavily.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the figure of speech used in the following sentence: “It was raining cats and dogs.”

### Output:
The figure of speech used in the sentence "It was raining cats and dogs." is an idiom. This idiom means that it was raining very heavily.