[LaGrange]

"I don't really like my ex."

When it's justified, "I think my ex was abusive," for example. That's quite biting, as far as I am concerned.

Edit: oh, I didn't relate to the "female" part. That's because you can't do that without being a horrible person yourself.

[Tichy]

Saying "my ex was abusive" makes you sound a bit like a victim, though. Why did you put up with being abused? Just saying, it is probably not the effect you wanted to achieve.

It is also more detailed, which might be even worse to spill in public than just generic insults.

[bluedanieru]

These aren't insults.

[LaGrange]

What. "Abusive" is not an insult to you?

Or is your problem based on the fact that "abusive" relates to an actual character trait, and not the gender of your ex?

[true_religion]

Calling someone abusive is descriptive.

Calling someone a bitch is an insult.

[scott_s]

Insults can be descriptive. In fact, the most biting insults are accurate descriptions.

[LaGrange]

OK, right, sorry. English as second language and all that.

Thus, my new Guide to Insulting People as a Decent Human Being: Don't.

[bluedanieru]

I suppose it is an insult if untrue. Sort of. But you specifically ruled out that case. No, I do not think it is an insult.