Expression: Under the weather

Under the weather is a great expression. It means that you don't feel well, but it's not really serious. Also, the expression isn't very specific; you could have a little cold, or a little stomach problem.

If you're not feeling very well, you can have a version of the following conversation:

Your coworker: "How are you?"

You: "A bit under the weather."

Now, if your coworker wants to know more, they can ask, but if not, they get the general idea.

It's important to notice that under the weather describes your physical state, not your emotional one. For more about what to say when you don't feel well, click here.