tā / gěi / hēi bāng / lǎo dà / dāng / gǒu tuǐ / zhuān mén / fù zé / shōu / bǎo hù fèi

他给黑帮老大当狗腿，专门负责收保护费。

He works as a henchman for the gang boss, specifically collecting protection money.