Essentially,
Pumping and Dumping refers to chopping and screwing a dubstep song. Much like Dj-Screw chopped
dirty south bangers,
pumping and dumping lowers the pitch and tempo of the song, and emphasizes the LFO wobbles. It actually resembles Purple more than dubstep. And there is more chopping, to the point where only the skeletal structure of the song is faintly present. This began Sept 22, 2011 and was created by B-Pride.