under the weather

I'm feeling a bit under the weather today, so I'll stay home

She's been under the weather for a few days with a bad cold

He decided to cancel the meeting because he was feeling under the weather

Don't worry, it's just a mild case of being under the weather

I hope you feel better soon; you look a little under the weather

The whole team was under the weather after that long flight

He usually comes to work, but today he's under the weather

I think I'm coming down with something; I feel quite under the weather

She's a bit under the weather and won't be able to attend the party

He's been under the weather since yesterday, so he's resting