그게 무슨 강아지 풀 뜯어먹는 소리야.
그게 무슨 강아지 풀 뜯어먹는 소리야? is this the sound of dog...풀 뜯어먹...? i dont understand the remaining, pls help me to explain it.

Thank you

Question

그게 무슨 강아지 풀 뜯어먹는 소리야.
그게 무슨 강아지 풀 뜯어먹는 소리야? is this the sound of dog...풀 뜯어먹...? i dont understand the remaining, pls help me to explain it.

Thank you

Answer

Literally, it means:
- 그게 무슨 [강아지(가) 풀(을) 뜯어먹는 소리]야(?) = What is that [(sound/story of) a puppy eating grass] you're talking about?

But it is rally an expression meaning what the other person said is ridiculous, or can never happen.  Dogs never eat grass no matter how hungry they are, so "a dog eating grass" is a colorful way to say that something is nonsense.

Answer

황당한 말을 들었을 때 할 수 있는 표현입니다