In addition to the accurate definition below, the reason that these girls are doing it all lies in the fact that they are completely insecure and so desperate to fit in that they create a transparent, fake way to SEEM unique, separate from those around them, and deep to everyone else. If it were real, and genuine, then they wouldn't advertise it so blantantly to EVERYONE around them. The fact that they broadcast this image is, in itself, evidence of this other motive. It's really just another manifestation of the teenage insecurity/struggle to find oneself and make a certain impression.
You know girls, I feel so connected to you all, in this superior, true understanding of existence way. I sure hope everyone else can't see through our projection! This is really the summer of love.