Clownstep is the negative but amusing name given to the jump-up genre of drum and bass. Use of the word when describing a track would indicate that it contains warbly basslines and outrageous swingbeats. Clownstep tracks usually song alot like the music you would here at a circus or after a few hours of giving you 3 year old nephew his first my tomy music sequencer.
The word originates from the mainly drum and bass music forum, dogsonacid.com, when DYLAN who is a figure head in the music scene did a thread claiming when he heard certain jump-up tracks, the crowd would remind him of clowns dancing in time to the swingbeats.
Clownstep has been such a phenomenon that it has seen recognition the world over, including having an entry in wikipedia.org. Producers such as Noisia, Evol Intent, Technical Itch, Teebee, Photek and many many more produce clownstep and there seems to be more and more up and coming wobbly producers making a name on the scene fairly frequently.
Raver 1: Did you hear that warbly bassline in that new Noisia track?!
Raver 2: Yea man, that was some proper clownstep, i cant wait for their set to be over so we can listen to Nightwalker, now that is proper music!