be skin and bone
US /bi skɪn ænd boʊn/
UK /bi skɪn ænd boʊn/

1.
皮包骨頭, 瘦骨嶙峋
to be extremely thin, often due to illness or lack of food
:
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After weeks in the hospital, he was just skin and bone.
在醫院住了幾周後,他只剩下皮包骨頭了。
•
The stray dog was skin and bone when we found it.
我們發現那隻流浪狗時,它已經瘦骨嶙峋了。