"...and I feel fine."
Usually uttered after exposure to some particularly unpleasant news article about the state of the environment, the economy, or legislative stupidity.
It comes from the chorus (and title) of a certain song by R.E.M., and is intended to suggest the immediately-preceding phrase.
Depending on context and intonation, it can also imply overtones of "...bring it on", "this, too, shall pass", or "I'm too tired to care anymore" -- sometimes, all three at once.
But, honestly -- how can you listen to this and not feel better?
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