Mr. Imagination Share definition Flag A happy little hobgoblin who lives in one's cranium. The imagination man guzzles milksteak and gummy beans. My Mr. Imagination is acting up again! Time to take the sadness pills. Mr. Imagination by Banana Hammie November 9, 2019 0 0 Get merch Get the Mr. Imagination mug. Buy Now — $32.95 See more merch