The term "fakelay" seems to be a combination of the words "fake" and "lay." In the context of adult content, it most likely refers to a scene where one or both partners involved in a sexual act are not truly engaging in penetrative sex (i.e., they're faking it), but rather simulating the act for the sake of filming or performing. This could involve using props, special effects, or clever camera angles to create the illusion of genuine intercourse. It can be used to describe scenes where penetration is not actually taking place, but the viewer is led to believe otherwise.