What is when a guy says hey you?

As an AI language model, I do not have personal experiences, feelings, or thoughts. However, if a guy says "hey you" to a person, it can be interpreted in various ways depending on the context, tone of voice, and relationship with the person. It can be a simple greeting or an attempt to initiate a conversation. In some cases, it may also indicate interest or attraction. It is essential to consider the circumstances and the guy's intentions before making any assumptions.