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Figurative UsagePlay
Often used non-literally to describe someone acting irrationally or unpredictably without being mentally ill. SlideShe went psycho over the surprise party plans.
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Negative ConnotationPlay
Using 'psycho' can be offensive; it stigmatizes mental illness. SlideIt's unfair to label him a psycho just for getting angry.
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Informal ContextPlay
'Psycho' is casual and may not be appropriate in formal or sensitive situations. SlideIn formal discussions, use 'person with a mental illness' instead of 'psycho'.