小三你捡了我不要的垃圾
[xiăo sān nĭ jiăn le wŏ bù yào de lā jī]
Meaning 'You picked up the trash I didn't want,' it metaphorically criticizes someone perceived as less valued or undesirable in a disparaging tone. In modern usage, 'xiaosan' often refers to a third party in relationships outside of formal marriage, implying betrayal and criticism.