under the weather

1. Indisposed, unwell: “The day after the big party, Jay had to call in sick, saying he was feeling under the weather.”

Idioms and Phrases

Ailing, ill; also, suffering from a hangover. For example, She said she was under the weather and couldn't make it to the meeting . This expression presumably alludes to the influence of the weather on one's health. [Early 1800s] The same term is sometimes used as a euphemism for being drunk, as in After four drinks, Ellen was a bit under the weather .

Example Sentences

She returned to public duties last week, but is understood to still be under the weather after a busy week of engagements.

From BBC

“He’s been under the weather a little bit. So I don’t know if that bled into the stuff, the velocity. I’m not sure.”

From Los Angeles Times

After that last appearance, Yamamoto started feeling “under the weather,” according to manager Dave Roberts, with an illness that left him with “a little weakness” leading up to Saturday.

From Los Angeles Times

I kept an open mind, thinking maybe he really was just under the weather that night but it had opened the floodgates of concerns that had been out there for a while.

From Salon

After exchanging breaks early in the opening set, it quickly became apparent that Sabalenka was feeling under the weather.

From BBC