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Jyutping baau3 cou1 hau2
Pinyin bào cū kǒu

Definitions (Wiktionary)
  1. verb, colloquial, verb-object
    to scream obscenity; to swear; to talk dirty
    (syn.) 爆粗
Definitions (Kaifangcidian)
  1. 說粗話 – 说粗话