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Jyutping cou3 nei5 maa1 bei1
Pinyin cào nǐ mā bī

Definitions (Wiktionary)
  1. phrase, slang, vulgar
    fuck your mother; fuck you
    (syn.) 屌你老母, 肏你媽, 使恁娘, 使恁母, 幹你娘, 肏你妈, 使恁殼, 使恁壳, 干你娘, 屌你老母𲈹, 屌你老母閪
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    肏你妈屄!
    肏你媽屄!
    cào nǐ mā bī !
    • Fuck you!