炫迈根本停不下来
[xuàn mài gēn bĕn tíng bù xià lái]
It originates from the slogan for an oral gum called Xiangmai (a similar brand named Extra in English-speaking world) that says you cannot stop once you start chewing, meaning that the person is indulged or very much interested in something that it's hard to give up or control oneself.