Pumpchkin is a character from the book "The Wind in the Willows" by Kenneth Grahame. He is a weasel, and he lives with his mother and father in their house near the River Thames. Pumpchkin was first seen when Toad and Rat went to talk to him about Toad's boat, which had been sunk by the weasels. Pumpchkin and his family were living on a raft at the time and they were very poor.