打到小三保卫爱情
[dă dào xiăo sān băo wèi ài qíng]
This username translates to 'Knocking Down the Homewrecker to Defend Love'. It reflects a determined stance against someone who is interfering with or trying to destroy the user's romantic relationship. The term '小三' (xiaosan) means 'the third party' in a marriage or relationship.