What is what does hey mean from a guy?

As an AI language model, I don't have personal experience, emotions, or opinions to provide an accurate answer to your question. However, in general, "hey" can be a casual greeting that someone sends as a way to start a conversation or to get someone's attention. In some contexts, it may indicate a lack of interest or effort in starting a conversation, while in others, it can be a friendly and genuine greeting. It really depends on the tone, context, and the person's intentions.