Julie: Oh, those girls are poorgeoisie. They only spend their money on lifestyle luxuries such as museums and food. They don't believe that you should pay attention to superficial things like clothes or hygiene.
Casy: ok, so "bourgeoisie" but more on a "i just got out of college and am poor" level, but they aren't really poor?
Julie: yeah, a less pretentious hipster.
Basically, when the economy tanked, many affluent people felt guilty about their overtly rich lifestyle. So, they still spend money like it's going out of style, but in order to look like a starving artist. It's easy to think the poorgeoisie resemble hipsters.