烏社會 [乌－会]

Jyutping wu1 se5 wui2
Pinyin wū shè huì

Definitions (Wiktionary)
  1. noun, Min-Nan
    triad (branch of Chinese underground criminal society)
    (syn.) 三合会, 三合會
  2. noun, Min-Nan
    the criminal underworld; gang