King Goon Share definition Flag A person who is an extreme goon, or an extreme idiot/ simpleton. Usually referred to rule over Goonlandia, or head a large group of goons. Look at Taylor fail at everything he does, hes such a King Goon. King Goon by JPR345 March 16, 2011 0 0 Get merch Get the King Goon mug. Buy Now — $32.95 See more merch