nonstream

One who does not conform to either mainstream or vehemently non-mainstream principles.

Person 1 (probably a modern hipster): "Do you watch <insert popular tv drama series>"? or "Did you go to <insert popular music festival>"?

Person 2: No, I spend my time and money on other things.

Person 1: Oh. So, you're like, proper nonstream.

Conversation ends because Person 1 is only able to talk about things which pertain to their interests.