Lately I've been searching for a current slang term, used in the US, describing people who live in a fantasy land, or prefer to live in a bubble.
After googling quite a lot, I realized that it's quite hard to search for this kind of thing, as slang is constantly changing and what may have been an excellent fit a year ago is long outdated today.
For clarification — The context should be somewhat cynical. The assumption is that living in fantasy is, of course, not recommended. You can think of it as a cynical slogan saying: "Not recommended for people who want to live in fantasy land".