1
general::
Phrase(s): under the weather
1. ill. • I feel sort of under the weather today. • Whatever I ate for lunch is making me feel a bit under the weather. 2. intoxicated. • Daddy’s had a few beers and is under the weather again. • Wally’s just a tad under the weather.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
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.
American Heritage Idioms