硬骨頭 (ngaang6 gwat1 tau4) — (noun) a tough guy in Cantonesengaangˍ₆硬gwatˉ¹骨tauˎ₄頭简 硬骨头Mandarin Pinyin: ying4 gu3 tou5Meaning of 硬骨頭noun(noun) a tough guy