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Jyutping ceot1 gung1 jap6 ging3
Pinyin chū gōng rù jìng

Definitions (粵典–words.hk)
  1. 動詞
    即​係​去​廁所​;​古​時​嘅​科​舉​考​試​有​兩​個​牌​,​一個​係​「​出恭​」​,​一個​係​「​入敬​」​;​考生​要​去​廁所​,​要​排隊​等​攞​「​出恭​入敬​」​牌​,​喺​茅​廁​解​決​完​就要​證實​係​考生​本人​先​可以​再入​去​考試​;​「​出恭​入敬​」​就​係​出入​試場​都​要​恭恭敬敬​嘅​意思
    to visit the washroom; literally "exit with reverence and enter with respect"