Here’s a roommate that you have probably encountered, if not in a living situation, then perhaps just around your neighbourhood. A hipster is generally someone who listens to bands you’ve never heard of, wears ironic tee-shirts, and believes they are better than you.
Also, a hipster is someone who is smart enough to talk about philosophy, music, politics, art, etc. with you all day long, but not smart enough to see how big of a tool s/he is. The only sure fire way to tell if someone you’re talking to is, in fact, a hipster is to ask them “are you a hipster?”. If they respond no, and turn their casette player back on, you can be sure you’re dealing with a hipster.
When living with a hipster, your biggest issue is pretty much just dealing with them denying their existence as a hipster, and blurting out something like “you can’t put a label on me, man!” when you do.
If you live with a hipster, feel free to tag them just to, once again, let them know what they are.