It is not proper English. Please try to help us maintain the integrity of the English language as you are learning it. I hope you will want to stick to higher ground in your use of English. It is a poor pronunciation or substitute pronunciation for "You [are] the one."

You da one : You're the one.... it is a kind of accent of the native speaker in using their language. just like in our country. for example: kamu tidak tahu ? => kamu gak tau yah..?

You are the one just black ghetto akcent