The question just popped out on seeing my colleague who sits next to me. He always keeps rotating sitting on the chair. Well, not a complete rotation. Since it is not a full rotation, all I can think of is to call it oscillating, since he rotates (oscillates) to his right and left having his feet on the floor, but I am not sure if that person can understand when I say, "Hey, can you not oscillate for some time?". This is because I don't know if oscillation can be used for used for a movement that happens in a circular fashion.
Is there an exact term/phrase for this action? I don't think shaking would be a good fit either.