fruitcake
uk
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/ˈfruːt.keɪk/us
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/ˈfruːt.keɪk/ noun slang a crazy person: My teacher's a bit of a fruitcake. 我的老师有点古怪。
loon
uk
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/luːn/us
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/luːn/ noun informal a person who is crazy, silly, or strange
lunatic
uk
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/ˈluː.nə.tɪk/us
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/ˈluː.nə.tɪk/ noun someone who behaves in a silly or dangerous way: He drives like a lunatic. 他开车像疯子一样。
maniac
uk
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/ˈmeɪ.ni.æk/us
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/ˈmeɪ.ni.æk/ noun a person who behaves in an uncontrolled way, not worrying about risks or danger: Some maniac was running down the street waving a massive metal bar. 有个疯子挥着一根粗粗的金属棍在街上奔跑。
fruit loop
uk
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/ˈfruːt ˌluːp/us
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/ˈfruːt ˌluːp/ noun mainly US informal someone who is silly or strange: He came across as being a complete fruit loop. 他给人的印象是一个彻头彻尾的怪人。
nut job
uk
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/ˈnʌt ˌdʒɒb/us
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/ˈnʌt ˌdʒɑːb/ noun informal someone who is crazy, silly, or strange: He's a total nut job. 他是个十足的疯子。
nutter
uk
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/ˈnʌt.ər/us
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/ˈnʌt̬.ɚ/ noun UK informal someone who is crazy, silly, or strange: He's a bit of a nutter. 他有点儿怪。
wacko
uk
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/ˈwæk.əʊ/us
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/ˈwæk.oʊ/ noun mainly US informal a person whose behaviour is strange and different from that of most people