What does "you're you" mean? Is it either a proper or common expression?

Rebecca

"You're you" means that someone is being themselves. They're not acting differently or like someone or anything else. In a similar manner of saying, "you're Hatter from Alice in Wonderland". It's identifying a person as themselves. It can be common to hear! Especially if someone was sick, or wasn't behaving the way they usually do, then someone might say this. Ex: I heard you were sick? You seem like yourself now. Ex: Last week, I felt like a completely different person because I was upset. But now I'm me again. Ex: I see that you're you again.