wacko

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++wack·o, whacko /ˈwækəʊ $ -oʊ/ noun (plural wackos) [countable] informal  a crazy or strange person 疯子；怪人 —wacko adjective That guy’s completely wacko. 那家伙彻底疯了。

Examples from the Corpus

wacko• He was innocent on grounds of being wacko.• Soon, the talk-show producer decides she has not found Mr Right but a certifiable wacko.• Ruby Wax found some real wackos in West Virginia-loons who use poisonous snakes in religious ceremonies.Origin wacko (1900-2000) wacky

wack·o nounChineseSyllable  

crazy person or strange Corpus a

wacko
wack‧o , whacko /ˈwækəʊ $ -oʊ/ noun (plural wackos) [countable] informala crazy or strange person
—wacko adjective:
    That guy’s completely wacko.