我苦笑著釋懷妳給的傷害
[wŏ kŭ xiào zhù shì huái năi gĕi de shāng hài]
This nickname translates to 'I laugh bitterly as I let go of the pain you gave me.' It suggests someone who has endured emotional hurt from a past relationship but is trying to move on with a mix of bitter feelings and acceptance.