无话不说最终变成无话可说
[wú huà bù shuō zuì zhōng biàn chéng wú huà kĕ shuō]
It means 'originally talked endlessly but finally became nothing to say'. This nickname probably comes from a specific stage in interpersonal relationships where both parties have lost things to talk about due to a variety of reasons such as lack of connection over time or a broken relationship, which may lead to separation.