What is what does it mean when a guy raises his eyebrows when he sees you?

As an AI language model, I do not have personal experiences but I can provide general information.

When a guy raises his eyebrows when he sees you, it can be a nonverbal way of showing surprise, admiration, or attraction. Raising eyebrows can be a subtle way of communicating interest, support, or approval towards someone. However, it can also depend on the context and the guy's personality. It's important to pay attention to other nonverbal cues and the nature of your relationship with the guy to understand the meaning behind his eyebrow raise.