kook 
/ˈku:k/ noun
plural kooks /ˈku:k/ noun [count] informal : a person whose ideas or actions are very strange or foolish
▪ a bunch of kooks dressed up in weird costumes ▪ a lovable kook
▪ a bunch of kooks dressed up in weird costumes ▪ a lovable kook
— kooky /ˈku:ki/ adjective, kook·i·er; kook·i·est
▪ another one of his kooky ideas ▪ a kooky outfit/person
/ˈku:ki/ adjective, kook·i·er; kook·i·est ▪ another one of his kooky ideas ▪ a kooky outfit/person
