It is a shuffle, used by the British post-hardcore band, Enter Shikari.
You can see it in their video to the single 'Destabilise'
It consists on them jumping from side to side together and Rob, the drummer, moving in time to them.
Fan 1: "Hey, did you see the new Enter Shikari video?"
Fan 2: "Yeah! Did you see them doing the Shikari shuffle? F*cking great mate."
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