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Jyutping laau4 cin2
Pinyin lāo qián

Definitions (CC-CEDICT)
  1. lit. to dredge for money
  2. to make money by reprehensible means
  3. to fish for a quick buck
Definitions (Wiktionary)
  1. verb, colloquial
    to make (a great amount of) money by questionable means