Hopstep
A sub-genre of dubstep. Is not quite as filthy as dubstep, and will typically have rap vocals and more of a hip-hop feel. Seen first in the UK, hopstep made its way into American on the coat tails of dubstep.
DJ was spinnin' some mad dubstep last night, then he dropped the grime and spit some freestyle hopstep on a mad dub beat.