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Jyutping wui4 檔:dong2
Pinyin huí dàng

Definitions (Wiktionary)
  1. verb, slang
    to lose a save file and its progress
  2. verb, of stock prices
    to fall temporarily
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 商業:臺
    回檔
  2. 商業:陸
    回調