an accomplice of a hawker, gambler, or swindler who acts as an enthusiastic customer to entice or encourage others.
a person who pretends to give an impartial endorsement of something in which they themselves have an interest:a megamillionaire who makes more money as a shill for corporate products than he does for playing basketball
verb
[no object]
act or work as a shill.
Origin:
early 20th century: probably from earlier shillaber, of unknown origin
