The term "disciple" in the context of a porn video refers to someone who is learning or following the teachings of another person, usually an older or more experienced individual. In this case, it likely refers to a scene where there is a mentor-student dynamic and the younger or less experienced participant is receiving guidance from the older or more experienced one. This can involve various activities such as teaching about sexual techniques, guiding through sexual experiences, or demonstrating how to use certain sex toys or other items. The use of the term "disciple" highlights a sense of respect and reverence for the mentor figure in this scenario.