Here's a few from my twisted skull...
"Aye, an' yer a sorry pyrate packing the hand-cannon in yer cabin, boy...now crawl off for another menage a mois"
"Sir, you harm none but the bedclothes about you..." (Shakespeare)
"There is not yet so ugly a fiend of Hell as you shall be" (also Shakespeare)
and this, plagiarized slightly from Christoph the professional insulter, to be used on a woman...
"You should become a nun, y'know, a bride of Christ. For only a man firmly nailed down could bear your countenance"
"Parry a few too many blows with yer jaw, eh?"
"Come, dance, oh grand pincushion"
after a masterful set of parries..."Ah, you've been fencing with your little sister again! She does enjoy playing with a good sword!" (admittedly, this one is below the belt)
Antagonist: "I'll carve out yer eyes!"
Hero: "Oh, sweet prayers answered! Then I'll not have to see your putrid face!"