Here's a breakdown of the phrase:
* Que: This is an exclamation, similar to "how" or "what" in English.
* Guap@: This means "handsome" or "beautiful". It's a common compliment.
* Que estás: This literally means "that you are", but in this context, it emphasizes the current state of looking handsome.
* Primo: This means "cousin".
So, the entire phrase is a playful and affectionate way of saying that someone looks good. It's often used between close friends or family members.