You know that face you make when you hear some fantastically nasty bits of bass music? The ones that might be mistaken for smelling something terrible, when your eyebrows scrunch and the shoulders pop up above the ears. Well, if you enjoy such a sensation, we suggest you give yourself a bit of personal space, some serious bottom end, and get your mits on Illcasso's brand new bass monster 'Rollin Up'. Just out today on KJ Sawka's upstart Impossible Records, the track appeals to trap fans, hip-hop heads, and anyone who know their way around a Dutch Master…