I think it's basically about karma.
Whether it's about being stabbed in the back or cheating/bulling like the previous comments said. She's saying that whatever this person is doing to her will 'come back around.' The person will get found out and their true colors will be exposed, people will see that this person isn't who they say they are.
It can be interpreted with almost anything anyone's ever done bad to you, just saying 'yeah, you'll get yours one day'
I think it's basically about karma. Whether it's about being stabbed in the back or cheating/bulling like the previous comments said. She's saying that whatever this person is doing to her will 'come back around.' The person will get found out and their true colors will be exposed, people will see that this person isn't who they say they are. It can be interpreted with almost anything anyone's ever done bad to you, just saying 'yeah, you'll get yours one day'