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Jyutping zik6 coeng4 zi2
Pinyin zhí cháng zi

Definitions (Wiktionary)
  1. noun, idiomatic
    straightforward person; someone who shoots from the hip

直腸子 [-肠-]

Jyutping
Pinyin zhí cháng zi

Definitions (CC-CEDICT)
  1. (coll.) forthright person