In this house we say, "a joke is when the other person laughs" and ignore their PA nonsense.
I refer to 'jokes' like this as Schrödinger's jokes. You say something mean, see if anyone is offended, if they are, it's a 'joke'
If you want to stay with him, you have to be much more assertive. He will either ramp up more quickly, in which case you know it's control and plan to leave. Or he will STFU in which case good communication worked.
"I'll have to get used to you drinking so much" gets:
Yes, you will. <deadpan>
I'll check myself into rehab. There is one specifically for people who drink less than 10 units a week <roll eyes>
God you sound like someone's granddad.
Please stop commenting on that, it's incredibly boring.
I'm Turing into a lush, putting up with you.
Yes dear, you've finally driven me to drink.
Would you please stop, it's like a broken record.
OK Mum.
Sarcastic and/or assertive. Take your pick.
If you wanted to be grown up, and I wouldn't, try WHEN I FEEL BECAUSE PLEASE.
When you comment on my very reasonable drinking, I feel angry/sad/anxious/whatever it makes you feel. Because I have made my choice about my body and it's mine to make. Please don't comment on things I put into my body again.
If he says, "I was only joking". "That's as maybe but I am asking you not to again".