I have referred to him as "him" mostly. Sometimes by his first name, or I have said boyfriend.
I will now start to refer to him as her "sancho". A hispanic term for what he is.
I use the word "cheated" or "cheating". Sometimes affair.
I had read to try not to talk bad about OM or name call. It would make her defend him.
I did purposely try not to use certain terms.
No more.
You're right, you don't name-call, and you don't run him down. Just don't pay him too much deferential respect, either.
Remember when Bush 41 used to call "Suh-DOM", "SAD-'em"?? I always thought GHWB was just being an idiot, and then I learned later that he was doing it ON PURPOSE -- to not pay respect to his enemy.
Calling him "The Idiot" would be bad strategy. Calling him "your boyfriend" is about right. Calling him "Tom" is too deferential.