To shake one's head, usually to indicate a negative response, disapproval, or disbelief

to wag or bob one's head from side to side, often in time to music or while reading

(idiom) to nod one's head and wag one's tail; to look self-satisfied or smug; to behave with lightheartedness or levity

ecstasy; MDMA; a type of synthetic stimulant drug that causes euphoria and can lead to involuntary movement and hallucinations

To heave a deep sigh while shaking one's head, expressing regret, sadness, or a sense of helplessness.