My friend likes to repeatedly shake his leg up and down when idle. In Chinese, there is a specific term for this action that, if loosely translated, would be "vibrating leg."
Is there a more general or commonly accepted term in English for this specific habit? This habit is quite common and as a child I would do it, too. But I was reprimanded by my mother for doing so and that is why I know the Chinese term and now I am wondering what the English term is.