sorry, I have not been feeling good.
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I left a can of Diet Coke in the car, and it was so hot that it expanded and started leaking.
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'canned' is slang for 'fired'.
example: He got canned because he mouthed off to the boss.
'fired' means that you lost your job because you did something bad.
'laid off' means that you lost your job because the company has no work.
If you are laid off, you might get your job back if the company improves in the future.