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Jyutping ban2 san4 dou1 mou5 geoi3 zan1
Pinyin bǐng shén dōu mǎo jù zhēn

Definitions (粵典–words.hk)
  1. 語句
    本應​誠心​向​神明​祈求​,​都​冇​一句​真話​,​引申​指​某個​人​好​唔​老實
    always dishonest; extremely mendacious; literally: to lie even when praying

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Jyutping ban2 san4 dou1 mou5 geoi3 zan1
Pinyin bǐng shén dū mǎo jù zhēn

Definitions (CC-CANTO)
  1. a compulsive liar, someone who lies constantly and egregiously; literally "lying even when praying to God"