Here are a few examples:
* "She's got a lot on her plate right now." This idiom means she's very busy.
* "I'm feeling under the weather today." This means you're not feeling well.
* "He's always pulling my leg." This means he's always joking around.
To make a sentence using "idiomatic," you can say:
* "The author's use of idiomatic language made the story feel more authentic."
* "Learning idiomatic expressions can help you understand native speakers better."