没心没肺没感觉不痛不痒不在乎
[méi xīn méi fèi méi găn jué bù tòng bù yăng bù zài hū]
It expresses a kind of indifferent and apathetic attitude, which means I have no emotion, feeling, or pain, nor care about everything. The person using this nickname may want to present an image of someone who is indifferent or unfeeling to others.