复数：screwballs
1.〈美俚〉(棒球的)怪球;怪人;白痴;怪事;怪东西;旋转球
2.古怪的;不合情理的;有怪癖的;不安定的,不能预测的
1.someone who behaves in a way that seems strange or slightly crazy. This word is sometimes used as an insult.
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