This porn video tag refers to a male performer who has female genitalia. It is a description often used in transgender or gender-nonconforming adult content, where individuals may have physical attributes that do not conform to typical expectations for their assigned gender. In this context, "guy" refers to the male appearance and presentation of the performer, while "pussy" refers to their female genitalia. This tag is meant to highlight the unique combination of both masculine and feminine characteristics present in the performer, catering to specific fetishes or preferences within the adult content viewing audience.