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I can't come to work today because I'm feeling under the weather.
The speaker is saying they are sick and cannot attend work.
Feeling ill or not in good health
After eating something bad, she felt under the weather for days.
She was sick for several days after eating something that made her ill.
This phrase is commonly used in casual conversation to describe mild illness or discomfort.
Use 'under the weather' when you want to casually mention that you or someone else is feeling sick without going into medical details.
The origin of this phrase is uncertain, but it may come from the idea that weather can affect one's health, or from nautical terms where 'under the weather' referred to being on the leeward side of a ship, which was often a less comfortable and more exposed position.
This phrase is informal and commonly used in everyday conversation to describe feeling unwell. It is not typically used in formal or medical contexts.