stop fidgeting停止坐立不安，别乱动。（stop doing）
fidget vi. 坐立不安=to make continuous, small movements that annoy other people。
n. 烦躁；烦躁之人=a person who often fidgets。

【例句】
Children can't sit still for long without fidgeting.
孩子们无法长时间老老实实地坐着不动。

I got the fidgets halfway through the lecture.
演讲听到中途我就坐不住了。