under the weather

adjective3

1. •
   ill or gloomy, especially from a cold or flu.

   • […] I met a stranger, a quiet little man, who also had been under the weather from malaria. — 1907
2. •
   Somewhat intoxicated or suffering from a hangover.

   • I was a bit under the weather last night: out with a party of friends, you know. Dare say we all had a bit more than we could carry. — 1907
3. •
   (no longer used) Experiencing adversity.

   • The Hawkinses are under the weather now, but their Tennessee property is millions when it comes into market. — 1873