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Jyutping mat1 nan2
Pinyin miē niǎn

Definitions (Wiktionary)
  1. noun, Cantonese, vulgar
    WTF
Examples (Tatoeba—Cantonese-English)
  1. Cantonese
    你喺度做乜撚嘢呀?
    你喺度做乜撚嘢呀?
    nei5 hai2 dou6 zou6 mat1 nan2 je5 aa3 ?
    • What the hell are you doing?
  2. Cantonese
    乜撚嘢嚟㗎?
    乜撚嘢嚟㗎?
    mat1 nan2 je5 lai4 gaa3 ?
    • What the bloody fuck is that?
  3. Cantonese
    吓,乜撚嘢话?个音乐节因为「门票销售未如理想」取撚消咗?
    吓,乜撚嘢話?個音樂節因為「門票銷售未如理想」取撚消咗?
    haak3 , mat1 nan2 je5 waa2 ? go3 jam1 ngok6 zit3 jan1 wai6 「 mun4 piu3 siu1 sau6 mei6 jyu4 lei5 soeng2 」 ceoi2 nan2 siu1 zo2 ?
    • Wait, what the fuck? The music festival got cancelled because of 'unsatisfactory ticket sales'?
  4. Cantonese
    做乜撚嘢呀你?
    做乜撚嘢呀你?
    zou6 mat1 nan2 je5 aa3 nei5 ?
    • What the fuck is wrong with you?
Examples (粵典–words.hk)
  1. Cantonese
    又做乜撚嘢呀,屌!
    又做乜撚嘢呀,屌!
    jau6 zou6 mat1 lan2 je5 aa3, diu2!
    • What the fuck are you doing?!
  2. Cantonese
    你做乜撚?
    你做乜撚?
    nei5 zou6 mat1 lan2?
    • What the fuck are you doing?