microsoft word – What do you call Someone who is stuck up and expects everyone else to deal with them. They act like their important and rich but aren’t

I have a cousin who grew up very well off. He is very rude and will randomly snap at people for little things. His father recently cut him off because he has always been bad with money. He refused to hold a job for too long because he feels like he deserves better. He has unrealistically high expectations for life. He thinks he deserves to get a high-paying job where he doesn’t have to work too much right off the back. He has always acted like he was above everyone else because of his dad’s money, but now he broke. The thing is he still behaves the same way even though he doesn’t have any money. I’m trying to find a word that perfectly describes him. So what do you call a rude person who acts like their rich but is actually broke?