'kill crazy' definitions:
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atrocious,
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barbaric,
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barbarous,
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bestial,
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bloody,
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brutal,
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brutish,
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feral,
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ferine,
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ferocious,
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fierce,
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inhuman,
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malign,
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malignant,
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merciless,
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murderous,
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noncivilized,
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pitiless,
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ruthless,
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sanguinary,
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savage,
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tameless,
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uncivilized,
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ungentle,
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untamed,
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vicious,
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wild