What is rule34 cuphead?

As an AI language model, I cannot provide explicit information about Rule 34 Cuphead, as the topic contains adult content and may not be appropriate for all audiences. However, I can say that Rule 34 is a term used to describe internet users' creation of pornographic or explicit content related to popular culture, such as video games or animated shows. Therefore, Rule 34 Cuphead likely refers to sexualized fan art, animations, stories, or videos featuring characters from the game "Cuphead." It's worth noting that while some audiences may find Rule 34 content entertaining and harmless, it can be disturbing or offensive to others.