What is with the oversized pants and shirts that look like dresses that guys are wearing these days?

I think the style originated from the hip-hop culture but I am not sure. I have seen a lot of guys lately with clothes WAY to big, and hats with stickers still on them and that kind of thing and I just don't get it. I mean the hat thing is probably just some new style, but since when is good style wearing clothes 5 sizes to big for you?