A group of teenagers who can normally be spotted with the guys having long hair and adolescent beards, whereas the girls will often have medium length hair and could be seen as in boyish clothes. Often the ethos of the group is that, they are anti-fashion and trends.
Some may view them as pretentious as for example, many will listen to bands that no one has heard of, just for the sake that no one has heard of them.
They could also be considered modern day hippies.
the kids wearing jumpers in summer with the long hair, that's the Hairies.