goosecap means A fool; a dolt. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Etymology
From goose + cap.
noun
- A fool; a dolt.“Lucy and Edmund and Peridan were busy with their plans for the battle and though Lucy once said, "But where is his goosecap Highness?" Edmund only replied, "Not in the front, and that's good news enough. Leave well alone."”