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Jyutping so1 daa2 fau6
Pinyin shū dǎ bù

Definitions (粵典–words.hk)
  1. 名詞、香港
    即​係​ ​澳門​。​由​於​去​澳​門​嘅​人​多​數​都​係​去​賭​(​過​大海​)​,​輸到​一乾二淨​先至​返​香港​,​而​「​梳打​」​嘅​其中​一個​作用​就​係​「​洗​走​污漬​」​,​所以​就​用​「​梳​打埠​」​比喻​澳門​係​「​一個​會​『​洗​走​』​晒​身上​嘅​錢​嘅​城市​」​。
    An old nickname of Macau. It is because a lot of people went to Macau for gambling. Their money were "washed away" in casinos, just like what washing soda does. Literally: Soda City