‘活该’ (huó gāi) is an interjection expressing strong, often unsympathetic judgment — essentially ‘serves you right’ or ‘you deserve it.’ Literally, 活 means ‘alive’ or ‘living,’ and 该 means ‘ought to’ or ‘deservedly,’ so together they suggest ‘you’re alive *and therefore* deserve this consequence’ — a blunt, almost fatalistic way of saying someone’s misfortune is the direct, fitting result of their own poor choices or behavior.

It’s commonly used in informal speech among friends or family when someone suffers a minor but predictable setback due to carelessness, arrogance, or breaking a rule — for example, forgetting an umbrella before rain, or ignoring advice and facing the outcome. While expressive and widely understood, it carries a sharp, sometimes harsh tone and is rarely appropriate in formal settings or with strangers. It’s not used for serious harm or tragedy; its register is conversational, mildly scolding, and emotionally charged.