肆行 Traditional form: 肆行 Pinyin (reading): sìxíng Definitions: to act recklessly Characters: 肆 - to indulge; excess; four (bankers' anti-fraud numeral) 行 - to go, to walk, to move; professional Traditional characters: 肆 - to indulge; excess; four (bankers' anti-fraud numeral) 行 - to go, to walk, to move; professional