Based on the provided documents, "ghosting" refers to a behavior where someone suddenly stops responding or interacting with another person, often after a date or social interaction, without explanation or communication. In the context of the dating reviews website, "ghosting" is one of the behavior tags that can be used to describe a person's actions. There is at least one review that mentions "ghosting" as a behavior exhibited by Diana Atoche, where she unfollowed the reviewer on Instagram and did not respond to any messages after a date. The website allows users to search for reviews using the "ghosting" tag, and there is a page dedicated to showing reviews that mention this behavior.