stooge

noun
1
a person who is used by somebody to do things that are unpleasant or dishonest
دست‌نشانده, مزدور, آلت دست, گماشته, آلت بی‌اراده
2
a performer in a show whose role is to appear silly so that the other performers can make jokes about him or her
دلقک دستیار, بازیگر دست دو