What is nip flash?

As an AI language model without access to any context, I cannot determine specific information about "nip flash." However, "nip flash" could potentially refer to a slang term for a wardrobe malfunction where a woman's nipple is briefly exposed. It is generally considered inappropriate and a source of embarrassment for the person experiencing it. If there is a specific context or topic related to "nip flash", please provide more information so I can assist you better.