薄情薄义少年无情无义凉情凉心姑娘百毒不侵
[bó qíng bó yì shăo nián wú qíng wú yì liáng qíng liáng xīn gū niáng băi dú bù qīn]
This username expresses the idea of being emotionally detached or callous, implying that the person (likely a young man) has no sympathy or feeling towards others. Similarly, the woman described is portrayed as immune to emotional harm or influence.