I think it has genericized beyond Twitter to mean "somebody with a username of HipsterIE6". I've seen it on pretty much every site I visit to mean users on that

I think it has genericized beyond Twitter to mean "somebody with a username of HipsterIE6". I've seen it on pretty much every site I visit to mean users on that site. Of course, then figuring out context becomes non-trivial: is this Twitter's HipsterIE6 or HN's HipsterIE6?