忘不掉你的微笑戒不掉你的傻笑
[wàng bù diào nĭ de wēi xiào jiè bù diào nĭ de shă xiào]
It describes a feeling where one can't forget another's smile and is irresistibly amused by that person's foolish grin. It represents being captivated or infatuated with someone to a great extent.