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Jyutping lou6 jan4 gaap3
Pinyin lù rén jiǎ

Definitions (Wiktionary)
  1. noun
    passer-by named "A"; person of little relevance or importance to the topic; ordinary person buried in the crowd of thousands
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    路人甲和路人乙
    路人甲和路人乙
    lù rén jiǎ hé lù rén yǐ
    • passerby A and passerby B