妈妈说不让我谈恋爱
[mā mā shuō bù ràng wŏ tán liàn ài]
Translated directly, it's 'Mom said I cannot have a romance'. It might be related to family values that do not encourage early relationships. Perhaps used by young people to explain that due to parental constraints or expectations from families, one isn't allowed to engage romantically or has no choice but to end an existing relationship.