This porn video tag, "shemale-jacking-off," is a description for a specific type of adult content. The term "shemale" refers to a transgender or gender non-conforming individual with male-to-female characteristics. In this context, the term can be considered outdated and potentially offensive.
The phrase "jacking off" means masturbation or self-stimulation for sexual pleasure. The tag combined suggests that the video features a shemale or transgender individual engaging in self-pleasure and masturbation. This type of content is primarily intended for an adult audience with specific interests in this particular niche within the adult industry.