What is what does it mean when a guy says hey girl?

As an AI language model, I do not have emotions to know what it really means when a guy says "hey girl". However, in general, when a guy says "hey girl" it can mean different things depending on the context and tone of the conversation. It can be a casual greeting, a form of flattery, or a way to get a girl's attention. Sometimes, it might also be a disrespectful or objectifying way of addressing a woman. Therefore, it's important to pay attention to the surrounding context and the guy's body language and tone of voice to gauge his intentions.