din1

Jyutpingdin1
Yaledīn
Common

Definition

Crazy, mad, or mentally deranged; wild, frantic, or silly.

  1. mad; insane; mentally deranged
  2. slangwild; frantic; silly
colloquialpeopledescriptions

How it's used

Beyond the literal meaning of mental illness, this word is frequently used as a hyperbolic exclamation to describe someone acting in an absurd, reckless, or highly irrational manner. It often functions as an adjective to label behavior that deviates from social norms or expectations. When used in the reduplicated form 癲癲得得, it carries a softer, more playful tone suggesting someone is being silly or flighty rather than genuinely deranged.

Examples

Are you crazy? Why are you throwing everything away for no reason?
He is always acting erratic, it is really hard to communicate with him.

Common phrases

acting silly or flighty

Common mistake

Do not use this word to describe someone with a clinical mental health condition in a serious or professional context, as it is considered offensive and derogatory. It is strictly a colloquial term for informal social interactions.

Grammar color guide

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Adjective
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