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Jyutping dong3 tau3 ming4
Pinyin dāng tòu míng

Definitions (粵典–words.hk)
  1. 語句
    無視​一​啲​嘢​或​人​,​扮作​睇​唔​到
    to treat something or someone as unimportant or irrelevant; literally: to treat as transparent
    • 簽晒國際條約都當透明,呢個正一無賴國家。
      签晒国际条约都当透明,呢个正一无赖国家。
      Signed all the international treaties but ignore them the next moment, what a rogue state.
    • 我望住都夠膽出貓,即係當我透明啫。
      我望住都够胆出猫,即系当我透明啫。
      How dare you cheat under my watch, you really look down on me.

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Jyutping dong3 tau3 ming4
Pinyin dāng tóu4ming

Definitions (CC-CANTO)
  1. to treat someone as a nobody or irrelevant or unimportant [colloquial]
Examples (粵典–words.hk)
  1. Cantonese
    签晒国际条约都当透明,呢个正一无赖国家。
    簽晒國際條約都當透明,呢個正一無賴國家。
    • Signed all the international treaties but ignore them the next moment, what a rogue state.