听了话的聋子说了慌的哑巴
[tīng le huà de lóng zi shuō le huāng de yā bā]
Literally means 'a deaf man who listened and a mute man who lied'. An idiom describing someone who cannot speak the truth even if they heard it, which can be quite confusing. It likely indicates someone who knows more than they let on but pretends ignorance.