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Jyutping wun2 jam1 dik1
Pinyin wán yīn de

Definitions (Wiktionary)
  1. verb, idiomatic
    to play dirty; to play dirty tricks

玩陰的 [-阴-]

Jyutping
Pinyin wán yīn de

Definitions (CC-CEDICT)
  1. to play dirty
  2. crafty
  3. scheming