橫行無忌 (waang4 hang4 mou4 gei6) — run wild with no scruples; do whatever one wants in Cantonese
waangˎ₄橫hangˎ₄行mouˎ₄無geiˍ₆忌简 横行无忌
Mandarin Pinyin: heng2 xing2 wu2 ji4
Meaning of 橫行無忌
nounrun wild with no scruples; do whatever one wants
nounto be lawless; to run wild; to run amok