The proper way to dance to dubstep.
To achieve this dance move, one must begin in a deep, open stance squat with one's arms extended out to the sides, elbows slightly bent, with the palms held upward. The dancer must then alternate shrugging each shoulder (as though he or she is "weighing the scale") while simultaneously scuttling side to side like a crab to the rhythm of the music.
"Everyone was crabstepping after the drop. It was a sight to behold."