I'm feeling under the weather.

Meaning

I'm slightly ill.

Examples

• John: 'I can't make it to the meeting today.'<br>
• Alice: 'Oh, I'm sorry to hear that. Are you feeling <b>under the weather</b>?'
• John: 'Oh no, what's wrong? Are you <b>under the weather</b>?'
• Alice: 'I don't think I'll be able to go to the party tonight.'<br>