哭不出蜡笔小新的悲伤
[kū bù chū là bĭ xiăo xīn de bēi shāng]
'Can't Cry Like Shin-Chan's Sadness,' referring to the protagonist Shin-chan from the popular manga 'Crayon Shin-chan.' It suggests hidden or hard-to-express sadness, similar to that portrayed by Shin-chan's often unconventional humor or emotions.