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Jyutping laau1 mui1
Pinyin lāo mèi

Definitions (粵典–words.hk)
  1. 名詞、俚語、大陸
    廣東人​對華北​年青​女性​嘅​貶​稱
    derogatory term referring to girls from Northern China; used mostly in Guangdong
  2. 近義詞
    撈鬆
Definitions (Kaifangcidian)
  1. 外省來的女孩子 – 外省来的女孩子

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Jyutping laau1 mui6
Pinyin lāo mèi

Definitions (CC-CANTO)
  1. girls from other regions, Cantonese people sometimes use this to refer to girls who migrated from the North; this term was used to refer to prostitutes in the past but this is less commonly used in this context nowadays
Definitions (Wiktionary)
  1. noun, Cantonese, derogatory
    young girl from northern China