네가 잘 모르는 모양인데 원래 얌전한 고양이가 부뚜막에 먼저 올라가는 법이거든? I think I know what this sentence means for the most part. You must not know very well but, the quiet cat is first to reach the top/climb the highest. But I've never come across the word 부뚜막. I searched a dictionary, and it provided a kitchen range or a cooking range as its meaning. I'm not sure that is all the way correct. Is there more meaning behind 부뚜막에. Is this a common phrase?