expression du jour : to feel under the weather

 I'm feeling under the weather = I'm feeling sick

I'm feeling under the weather, I can't go to university today.

Yesterday I was feeling under the weather, so I didn't go to work and slept all day.

I feel a little under the weather so I don't think I will go to the cinema tonight.

Petite précision sur le verbe feel : on peut dire à la fois I feel ou bien I'm feeling pour une action qui se passe en ce moment.