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Jyutping daan2 coeng1
Pinyin tán chuāng

Definitions (Wiktionary)
  1. noun
    pop-up window (on a computer, smartphone, etc.)

彈窗 [弹-]

Jyutping
Pinyin tán chuāng

Definitions (CC-CEDICT)
  1. pop-up window (computing)