Agree with everything said so far. Although it isn't that popular yet, blazers and jeans screened/patched with some sort of gaudy graphic.
Non-sensical graffiti and graphics on everything
, and raw seams on everything, too. The first guy ever to do it was probably pretty cool, but everyone else... My favorite tragic look of the moment - jeans or cargo pants (with graffiti), short-sleeved t-shirt (with graffiti), and sleeveless hooded sweatshirt (with, surprise surprise, graffiti). Add a trucker cap, and make everything pastel, and you've got it. Especially funny if they're travelling in packs. They look like a street gang from some kind of 1980s future.