Ellenpoly, sorry about mispelling persnippity, I think it was actually a typo. My brain moves much faster than my two pointer fingers.

As to a word for ex wife, how about swife?

Can anyone come up with a good name for a fiance who dumps the girl for an affair with a married woman? The best I could do at the time was pondscum. Now I rarely think of him at all, the best revenge, I think.