骨瘦如柴

gǔshòu-rúchái

[thin as a lath; be skin and bone; be reduced to mere skeletons; have emaciated limbs] 形容消瘦到极点

延及岁余, 奄奄待尽, 骨瘦如柴, 支枕而卧。 --《警世通言》四回