以毒刺心
[yĭ dú cì xīn]
Literally translated as 'To sting the heart with poison'. This carries heavy negative connotations about pain, hurt, resentment stored deep within the user’s psyche perhaps due to certain events/relationships left unresolved. However, beyond its literal interpretation, this could denote sharp insight and cutting remarks often used by the user or encountered by him/her in reality.