It's/That's not on
We use this expression to say that something is not acceptable.
| Written | Yes |
|---|---|
| Spoken | Yes |
| Formal | No |
| Informal | Yes |
Example 1
Shut up and get me something to eat.
Don't talk to me like that. It's not on.
Example 2
He's told me I have to stay here until I finish everything.
That's not on. It's already midnight. You need to get some sleep.
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