loon uk / luːn/ us / luːn/ noun informal. a person who is crazy, silly, or strange. lunatic uk / ˈluː.nə.tɪk/ us / ˈluː.nə.tɪk/ noun. someone who behaves in a silly or dangerous way: He drives …
someone who behaves in a silly or dangerous way: He drives like a lunatic. 他开车像疯子一样。. maniac uk / ˈmeɪ.ni.æk/ us / ˈmeɪ.ni.æk/ noun. a person who behaves in an uncontrolled way, …