伤心伤心伤你妹
[shāng xīn shāng xīn shāng nĭ mèi]
While literally translating to 'Sadness, Sadness, What Are You Crying For?', this is an expression of deep frustration or disappointment, with some humor or sarcasm added in the final phrase ('sister') which is a common way for expressing intense feelings mixed with disbelief or impatience.