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Jyutping lou5 gu1 po4
Pinyin lǎo gū pó

Definitions (粵典–words.hk)
  1. 名詞
    冇​結​婚​嘅​老​女人​;​帶​貶義或​自嘲​嘅​意思​(​量​詞​:​個​)
    old woman who has never been married; spinster; often used in derogatory or self-deprecating manner
Definitions (Wiktionary)
  1. noun, Cantonese, Hakka, Min-Nan, derogatory
    spinster; old unmarried woman
    (syn.) 老女, 家姑老, 老處女, 老閨女, 老大小姐, 老院主, 老姑嫲, 老紅花女, 老姑娘兒, 公眾姑嫲婆, 老女子, 老丫頭, 老小姐, 老大姑娘, 老姑子, 老姑娘, 老嫚姎, 老大姐, 老姑婆, 老大閨女
Definitions (Kaifangcidian)
  1. 老姑娘
  2. 老處女 – 老处女

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Jyutping lou5 gu1 po4
Pinyin lǎo gu1pō

Definitions (CC-CANTO)
  1. an old spinster [colloquial]