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Chinese dictionary
adj.mentally deranged; acting like a lunatic; be mentally deranged; flighty
他妈妈完全是疯疯癫癫的。
His mum’s completely batty.
有的人天生就是疯疯癫癫的。
Sometimes people are just crazy in born.
他的女房东有点疯疯癫癫。
His landlady appeared to be slightly off her rocker.