The tag "bigflip" seems to be a combination of two words: "big" and "flip." In the context of adult content, it can have different meanings. Here are some possibilities:
1. A scene or video featuring people with large body sizes (big), particularly larger women, sometimes referred to as BBW (Big Beautiful Women) or "curvy" individuals. The term "flip" in this case may refer to a change of position or perspective during the scene. This could mean that there's a flip-flop between who is dominating or submissive in the scene.
2. It could also be interpreted as a flip in genre. If typically you see straight porn, "bigflip" might mean something like a lesbian or group sex scene, flipping from your usual preference.
Remember, this interpretation assumes that the tag is related to adult content and English language. Since it doesn't specify any other language, it can also be interpreted differently if context suggests so.