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Jyutping mou5 tong1
Pinyin mǔ tāng

Definitions (Wiktionary)
  1. adj, Taiwanese-Mandarin, slang
    bad
  2. adj, Taiwanese-Mandarin, slang
    unacceptable; especially for something lewd

母湯 [-汤]

Jyutping
Pinyin mǔ tāng

Definitions (CC-CEDICT)
  1. (Tw) (slang) don't; must not; won't do (from Taiwanese 毋通, Tai-lo pr. [m̄-thang], similar to Mandarin 不要[bu4 yao4] or 不行[bu4 xing2])