wallah
noun [ C ] UK informal or Indian English uk/ˈwɒl.ə/ us/ˈwɑː.lɑː/
承担…职责的人，做…工作的人
(in compounds) a person who has a particular duty
I made the tea yesterday so it's Mira's turn to be tea-wallah this afternoon. 昨天是我沏的茶，所以今天下午该轮到米拉沏茶了。
a rickshaw-wallah 人力车夫