1. Out of: This is the most common way "out" is used as an idiom. It means something is not present, depleted, or unavailable.
* Out of milk: We're out of milk for breakfast.
* Out of time: I'm out of time; I need to leave.
* Out of options: I'm out of options; there's nothing I can do.
2. Out of it: This means not alert, conscious, or aware.
* He's been out of it since the accident.
* I'm feeling really out of it today.
3. Out of sorts: This means feeling unwell or upset.
* I'm a little out of sorts today. I didn't sleep well.
* She's been out of sorts ever since her job loss.
4. Out of the loop: This means not aware of what's happening or what's going on.
* Don't tell me anything! I want to be surprised.
* I've been out of the loop. Can you catch me up on what's going on?
5. Out of sight, out of mind: This proverb means that something is easily forgotten when it is no longer visible.
* It's important to keep things in sight so you don't forget about them.
6. Out of the blue: This means unexpectedly or without warning.
* He called me out of the blue and asked for a job.
7. Out of character: This means not in line with someone's usual behavior.
* It was completely out of character for her to yell at the waiter.
8. Out of control: This means unmanageable or chaotic.
* The situation has spiraled out of control.
* I can't handle the kids; they're out of control!
9. Out on a limb: This means taking a risk or making a bold statement.
* I'm going out on a limb and saying that we'll win this game.
10. Out to lunch: This means not thinking clearly or being out of touch with reality.
* Don't tell him anything; he's totally out to lunch today.
These are just some of the ways "out" can be used as an idiom. The specific meaning will depend on the context.