I'm from europe, so I don't know.

I've seen it on a couple of hospital forms.

I'll add the DNF- Do Not Filtrate. Meaning no dialysis at all. Even if the person is in acute renal failure and it could save their life.

This man made me very uncomfortable just from reading your post.

His temper, betting money when you live paycheck to paycheck? His controlling behaviour? Looking for stepdaughter p0rn?

He's a walking red flag waving more smaller red flags.

Kick him out.