What is the Meaning of the Idiom
UNDER THE WEATHER?
ill, or unwell
Typically this suggests a general feeling of discomfort, rather than specific pain such as a headache or vomiting.
UNDER THE WEATHER is most commonly used with the verbs to feel, to be, or to look.
1. I think I am getting the flu. I have been feeling under the weather all morning.
2. I think you should stay home tonight. You look a little under the weather. Why don’t you go to bed early instead of coming with us?
3. A: Where’s John this morning?
B: He drank a lot at the party last night! He is probably feeling under the weather this morning!