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Jyutping dou2 pung4 tau4
Pinyin dào péng tóu

Definitions (Wiktionary)
  1. verb, Wu, slang
    to lose money (in business); to make a loss; to run at a loss
    (syn.) 亏本, 了本, 蚀本, 赔本, 了大空, 塌本, 打出本, 虧損, 虧本, 倒貼, 亏损, 贴本, 蝕本, 貼本, 折本, 了錢, 了钱, 了去, 賠本