This porn video tag refers to a specific genre of adult content that features transgender male individuals. The term "tranny" is often used as an abbreviation for the word "transgender," while "boy" indicates that the performers are male-identifying individuals who have undergone some form of masculinizing hormone therapy or gender affirmation surgery, resulting in the presence of male genitalia and a male chest. "Pussy" refers to the term used for female genitalia and indicates that the content focuses on these body parts, likely involving oral, penetrative, or manual sexual activity. In summary, this tag describes a porn video featuring transgender male individuals engaging in sexual acts that involve their male genitalia and female genitalia.