菇凉无心
[gū liáng wú xīn]
The phrase means 'the girl has no heart.' Here, 'heart' does not necessarily mean physical organ but refers more towards intention, attention or sentiment. A girl saying this might feel she can't express her emotions correctly, leading people to misunderstand her as unfeeling or indifferent. In other circumstances, she may feel that what has happened to her cannot make her touchy anymore.