换掉心脏给我一副铁石心肠
[huàn diào xīn zàng jĭ wŏ yī fù tiĕ shí xīn cháng]
Translating to 'Give me a heart of stone,' it refers to someone wishing they could exchange their tender-heartedness for a colder and unfeeling nature. Often used by those who have suffered hurtful experiences, seeking emotional detachment to protect themselves from further pain.