Can you use hyphens in between words in an idiom?

Yes, hyphens can be used in idioms, particularly when they help clarify meaning or improve readability. However, it's important to use them correctly and consistently. For example, "run-of-the-mill" is a hyphenated idiom that means something is average or ordinary. Overall, whether to use hyphens depends on the specific idiom and the context in which it is used.