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Jyutping mang3 maau1 mei5
Pinyin meng māo wěi

Definitions (粵典–words.hk)
  1. 動詞、俚語
    兩個​或​更​多​人​喺​其他人​唔​知​嘅​情​況​之下​,​夾埋​嚟​呃​人​、​講大話
    (of two or more people) to collude with each other to avoid a problem or to deceive or frame up others; literally: to pull a cat's tail
  2. 近義詞
    扯貓尾

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Jyutping maang1 maau1 mei5
Pinyin mēng māo wěi

Definitions (CC-CANTO)
  1. the action of two people conspiring together in hope to cheat or scam others