没心没肺没心肝
[méi xīn méi fèi méi xīn gān]
Loosely translated as 'Heartless Lungs, Heartless Liver', this refers to someone who is carefree, detached from emotions, and lives without worrying. While negative traits, this may refer metaphorically to living carelessly or freely from emotional burdens, perhaps after experiencing much turmoil.