Yes, the phrase ‘I’ll eat you up’ in Maurice Sendak’s Where the Wild Things Are can be considered a figure of speech. Specifically, it is an example of hyperbole, which is an exaggerated statement not meant to be taken literally.
In the context of the story, this phrase captures the Wild Things’ wild and unpredictable nature. It’s used to express their excitement and exuberance rather than a literal intention to eat. This exaggeration adds to the fantastical element of the narrative, highlighting the imaginary world that Sendak creates for children. Such language invites young readers to embrace creativity and the freedom of imagination, communicating emotions and experiences that resonate deeply with them.