He fidgeted around in his chair while waiting for the results.

fidgeted 是动词 fidget 的过去式。fidget 指"坐立不安地小动作"，通常是因为紧张、焦虑或无聊而做出的无意识小动作，比如摆弄手指、抖腿等。fidgeted 在这里描述的是"坐立不安地扭动身体"的状态。