In English, it is common to ask "You mean XXX...?" when a person does not understand enough what the conversation opponent said. I'm now in China, and to express the same thing I usually say the following:
X: 和啊你呢啊哈你哈看明日开幕韩人口日民哦那人口仍然要卖烤肉日日易容让粑粑你和那会让扣扣密码全牛皮光荣日光浴热卖款日日
I: 你的意思是XXX?
Or
I: 你意味着XXX?
However, I feel this is quite awkward and just a silly translation from the equivalent English. In fact I have never seen any Chinese to say in the same way, although I should have rarely seen any Chinese are in these situations, so actually I'm not sure if my impression is correct or not.
So how can I express "You mean ...?" in Mandarin, to ask what they mean?