It seems like "vpn飞鱼鱼" might be a playful or creative term, possibly used in a specific community or context where terms are designed to be humorous or niche. The acronym "vpn" likely refers to "vertex private network," as you mentioned, which is a term related to cybersecurity and internet services. The term "飞鱼" is less clear to me, but it might be a typo or a mishearing of a different word. If you could provide more context, I could give a more accurate interpretation. Otherwise, it might be best to assume it's a creative term as described.