The term "fat-ftm" in a porn video tag refers to a specific category within the trans adult industry. FTM stands for Female-to-Male, referring to individuals who were assigned female at birth but identify as male and may be undergoing various forms of gender transition, including hormone replacement therapy and/or surgeries. In this context, "fat" is a descriptor for body type, meaning the individuals involved in this content are generally larger or plus-sized.
This tag indicates that the porn video features transgender men (FTM) with larger body types, catering to a niche audience who enjoy this specific combination of factors. It's essential to remember that everyone has unique preferences and this tag is simply a way for creators to label their content to help viewers find what they are looking for.