谢谢你捡了我不要的垃圾
[xiè xiè nĭ jiăn le wŏ bù yào de lā jī]
It conveys sarcasm or self-deprecating humor. It literally says ‘Thank you for picking up the garbage I don’t want,’ which could be referring metaphorically to a person’s unwanted affections or things. Often such nicknames reflect complex emotions about rejection or dismissal.