Expression explanation needed
그만해라 뼈 삭는다

Literally,

Stop! Bone rots off (or saps out)

What does it mean exactly and how does it come about?

Question

Expression explanation needed
그만해라 뼈 삭는다

Literally,

Stop! Bone rots off (or saps out)

What does it mean exactly and how does it come about?

Answer

뼈가 삭다 = 뼈가 약해지다 means "have weak bones"

그만해라 뼈 삭는다 means 
Stop doing that unless you will have weak bones. (Used as an excuse to prohibit some bad habits)

Answer

You should guess the meaning from context. 뻐가 삭다, 골병이 들다,  겉으로는 멀쩡하지만 속으로는 병이 들거나 상처를 입다.