empty shell
US /ˈɛmp.ti ʃɛl/
UK /ˈɛmp.ti ʃɛl/
1.
a person or thing that has lost its essential qualities or contents, leaving only the outward form
:
•
After the tragedy, he felt like an empty shell, devoid of emotion.
•
The old factory building was just an empty shell, waiting for demolition.