想当年咱们一起抄过的作业想当年咱们一起骂过的老师
[xiăng dāng nián zán men yī qĭ chāo guò de zuò yè xiăng dāng nián zán men yī qĭ mà guò de lăo shī]
This is a reminiscence of school days when the person along with their classmates cheated on homework together and spoke ill of teachers behind their backs, which now has become amusing memories that are cherished.