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Jyutping gaa2 gung1 zai3 si1
Pinyin jiǎ gōng jì sī

Definitions (CC-CEDICT)
  1. official authority used for private interests (idiom); to attain private ends by abusing public position
Definitions (粵典–words.hk)
  1. 語句
    用​公家​資源​,​地位​或者​名分​嚟​圖​一己​之利
    to use public office for private gain: to job
    • 佢經常假公濟私,話去出差,其實去外國旅遊。
      佢经常假公济私,话去出差,其实去外国旅游。
      He often feathers his own nest by sightseeing abroad in the guise of business trips.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to exploit public office for private gain
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    假公济私
    假公濟私
    gaa2 gung1 zai3 si1
    • to use public office for private gain
  2. Cantonese
    佢经常假公济私,话去出差,其实去外国旅游。
    佢經常假公濟私,話去出差,其實去外國旅遊。
    • He often feathers his own nest by sightseeing abroad in the guise of business trips.