boggartEtymologyAs a monster that feeds on fear, coined by British novelist J. K. Rowling in 1999 in Harry Potter and the Prisoner of Azkaban.boggart means A shapeshifting monster that feeds on fear. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA shapeshifting monster that feeds on fear.“"A boogeyman," I said. "Sometimes known as a boggle or a boggart. It's a weak form of phobophage - a fear-eater, mostly insubstantial."”