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Jyutping lou4 lou2
Pinyin lāo lǎo

Definitions (Wiktionary)
  1. noun, Cantonese, derogatory
    man from northern China

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Jyutping laau1 lou2
Pinyin lāo lǎo

Definitions (粵典–words.hk)
  1. 名詞、大陸
    廣東人​對華北​中年​男性​嘅​貶​稱​;​由來​睇​撈​鬆
    derogatory address by Cantonese to male adults from Northern China; see 撈鬆laau1 sung1 for the origin
Definitions (Kaifangcidian)
  1. 外省人
  2. 北方人
  3. 外地人