A hipster, in short, is the male version of the female “white girl” stereotype. Very first world, too good for everybody else around, pompous without any real good reason to be. Wannabe, trend-follower, etc.
“Kids today don’t know alternative. Why, back in MY DAY, we knew alternative when there was a real choice in the matter”.
Stuff like that.
Another variation of hipster is “neckbeard”. But all stereotypes are generally ridiculous anyway.