The term "brain-dead" means acting extremely thoughtless, slow, or unintelligent, often due to fatigue, distraction, or poor judgment. The structure is a metaphor where "brain-dead" exaggerates lack of mental activity, not a literal medical condition. It is informal slang commonly used in everyday and online speech, usually as a harsh criticism of careless or nonsensical behavior.

“brain-dead”的英语定义和含义

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