He sold my old household item to someone but was bargained down. I told him he Shouldn't have but he said it was my fault for not stating no offers on the ad.
I wouldn't have even minded too much but the way he came in having a go saying that's my fault I shouldn't have sent him, set the argument off. I only asked him to go as I had a flat tyre.
So let me get this right.
He didn't even come back, say I sold it for whatever/they bargained me down; and you then criticised that?
Not that him calling you a fat bitch repeatedly in a resulting argument would be ok if you did ... Bug it sounds like you didn't even do that. He came in and said he's been bargained down, and said you should have said no offers and also shouldn't have sent him...even though you're pregnant and have a flat tyre on your car.
So he got bargained down/accepted a lower offer but then came back annoyed about it and started blaming you.
So, he can't accept any responsibility for his own actions and decisions, he can "stand up for himself" very well around his partner (actually he's verbally abusive) but can't stand his ground or be tough with strangers (!) He made a decision he was frustrated with/disappointed with (maybe not to come back again with the item) but it was his decision and not your fault. Anyway ppl will still offer even when you say no offers.
No matter what happened he had absolutely no right to vet ally abuse you with nasty personal insults (ridiculous ones at that given you're pregnant), in front of your child too.
That's the part that makes him abusive.
You haven't acted abusively that I can see.