The porn video tag "hairy gay (gay)" refers to a specific type of adult content featuring gay male sexual encounters. In this case, the term "hairy" suggests that one or both of the individuals involved have body hair, which can be a turn-on for some viewers. The word "gay" indicates that the content is focused on male-on-male sexual activities, and the repetition of "gay" may simply emphasize this aspect. Overall, this tag describes gay pornographic videos where the participants have body hair, appealing to those who find this characteristic sexually attractive.