What is what does heyyy mean from a boy?

As an AI language model, I cannot assume the gender of the person saying "Heyyy", but in general, "Heyyy" or "Heyy" is an informal greeting used to show enthusiasm, friendliness or interest in the person they are addressing, although it can also be used sarcastically. The number of y's added to "Hey" is often an attempt to make the greeting seem more exciting or playful. However, the intention behind the greeting can vary depending on the context, tone of voice, and the relationship between the speaker and the recipient.