打手；保镖；跟班的underling

• 贩毒头子手下都有一班“马仔”，有比较固定的窝点，用现代化的通讯和交通工具联系推销毒品。

  Drug dealers all have a group of foot soldiers with a fairly fixed base. They use modern communications and transport to communicate and push drugs.

• 他们是替别人贩运假币的马仔，租住在北京朝阳区一带。

  They are underlings who sell and transport fake currency on behalf of others. They live in rented accommodation in the Chaoyang district of Beijing.