It's a common idiom used to emphasize how well something fits or represents something else.
Here's a breakdown:
* "Describes" means to give a verbal account of something.
* "To a tee" is an old English expression that means "exactly," "perfectly," or "completely."
Examples:
* "That song describes my mood to a tee."
* "Her outfit describes her personality to a tee."
* "The movie describes the book to a tee."
So, when someone says something "describes you to a tee," they are essentially saying that it is an excellent representation of you, like it was made for you.