Be (all) skin and bone(s) American British informal
If you say that someone is all skin and bones, you mean that she is very skinny and even emaciated.
When I was a teenager, I was all skin and bones.
Jane has been snowed under the huge workload for weeks, that is the reason why he is all skin and bones now.
The failure of the crops caused all children in the village to starve. Therefore, they were all skin and bones.
Be extremely thin or slender
to say or reply something without having thought about it or knowing whether it is corect
To think carefully and seriously or ponder about someone or something
To help or convince someone to begin thinking reasonably (about something).
To think about an issue or possibility thoroughly and without haste.
This idiom is often assumed to be of Biblical origin. It dated back to the 1400s.