'坏人' (huài rén) literally combines 坏 (huài), meaning 'bad', 'evil', or 'spoiled', and 人 (rén), meaning 'person'. Together, it refers to a person who behaves immorally, harms others, or violates social norms—often with intent. It carries a strong moral judgment and is commonly used in everyday speech, children’s stories, news reports, and moral discussions.

The term is broad but usually implies deliberate wrongdoing—not just incompetence or misfortune. While it can describe real criminals or bullies, it’s also frequently used playfully or hyperbolically among friends ('You ate my dessert? You’re such a bad person!'). Context determines seriousness: in formal writing, more precise terms like 罪犯 (criminal) or 恶人 (evildoer) may be preferred. It’s rarely used as a self-description and often appears in warnings, advice, or cautionary tales.