John Dryden used it as early as 1697, in 'The works of Virgil'.
"ex<x>pression of excitement when seeing the ob<x>ject of one's romantic affections.<br />
Originally used with the swooning earnestness of women's poetry of the Romantic period. Now more often used ironically, about suitors who are indisputably unsuitable."
I'm pretty sure it's "be still my beating heart"
It's a Sting song