What is a blumpkin?

There's no known real-world plant or creature called a "blumpkin." It's likely a fictional creation. To give you information, we'd need to know where you encountered this word. Is it from:

• A book or story? If so, providing the title and author would help find descriptions of what a blumpkin is in that specific context.
• A game? (Video game, board game, etc.) Specifying the game would allow for a look at its game mechanics and lore.
• A personal creation? If you invented the term, you can describe its characteristics, appearance, and properties.

Without more context, any description of a "blumpkin" would be purely speculative.