没心没肺

没心没肺:

Literally means:

with no heart or lungs be ungrateful or unconscionable; be carefree

Actually means:

It means one has no conscience. Derogatory.

It figuratively means one is not calculating or planning. Slightly derogatory.

It figuratively means one is optimistic and carefree,and does not care much about gains and losses.

指人没有良心。具有贬义色彩。

形容人没有心机或不动脑筋。略含贬义。

形容心景清净，十分乐观，不计较得失,无忧无虑。