Tā / shì / nàge / hēibāng / lǎodà / de / gǒu / tuǐ / zi / zhuānmén / tì / tā / gàn / huàishì

他是那个黑帮老大的狗腿子，专门替他干坏事。

He is the lackey of that mafia boss, specifically doing bad things for him.