I bet all of us used idioms in one way or another in our everyday lives. Now then, I as myself a new question.

What is the unique use of idioms in fanfiction writing? Literary writing?

When are these kinds of idioms best used? How do you manage using Idioms?

Is it fun creating your own idiomatic expressions? If you are creating your own idioms, what are the challenges of making them describable to your target readers? If you created your own idioms, share it to us along with its meaning.

What's your personal opinion about idioms in writing?