The porn video tag "bubblebutt-femboy" refers to a specific type of content in the adult entertainment industry. This tag consists of two parts:
1. "Bubblebutt": This term is used to describe a person, typically a woman, who has a large and round buttocks. It implies that the individual's derriere is particularly voluptuous and noticeable.
2. "Femboy": This term combines the words "female" and "boy," referring to someone who exhibits characteristics of both genders. A femboy is typically a woman or a girl who dresses in a masculine or androgynous fashion, or has features that are usually associated with masculinity.
So, the tag "bubblebutt-femboy" describes adult content featuring a voluptuous, round buttocks on someone who exhibits characteristics of both femininity and masculinity. This might include scenes where the performer is dressed in a gender-bending or androgynous manner, showcasing their curvaceous derriere. It caters to viewers who are specifically interested in this combination of traits.