你瞒我瞒你忘我亡
[nĭ mán wŏ mán nĭ wàng wŏ wáng]
It translates to something deeper like 'You Hide, I Hide, You Forget, I Perish.' It expresses feelings of mutual deception and forgetting leading to eventual loss or destruction. It portrays themes of deceit, forgetfulness, and the consequences thereof.