你给的痛你永远不懂
[nĭ jĭ de tòng nĭ yŏng yuăn bù dŏng]
Directly translated to English this means 'The pain you inflicted upon me is what you'll never understand'. This indicates a profound resentment and sorrow felt towards a previous loved one. Despite experiencing deep pain from another, the owner of the nickname believes the other will never really grasp or comprehend this sentiment - indicating a level of frustration and helplessness in their perspective.