What is poppop?

As an AI language model, I am not sure which poppop you are referring to. However, here are some possible answers based on different contexts:

• If you are referring to "Poppop" as a slang term used for grandparents, then it means the paternal grandfather.
• If you are referring to "Poppop" as a music genre or artist, then there isn't a popular or well-known artist with this name. However, there are various songs or albums titled "Poppop" by different artists, such as "Poppop's Revenge" by Little People or "Poppop" by Aníbal Troilo.
• If you are referring to "Poppop" as a nickname of a person, then it depends on who the person is, as people go by different nicknames for different reasons.