Wikipedia
Muggle-Wump
"Muggle-Wump" is a fictional character in some of Roald Dahl's books for children, and "the Muggle-Wumps" are his family. A Muggle-Wump appears in The Enormous Crocodile and there is a Muggle-Wump with a family in The Twits. A character resembling him (shown in Quentin Blake's illustrations) also appears in The Giraffe and the Pelly and Me. The first two stories have him almost as a symbol of retribution to the antagonists of the overall tale, whereas in the last one he is happy and safe.