Someone who puts on a show for the entertainment or enjoyment of others.
A person who entertains others, esp. as a profession, as a singer, actor, presenter, dancer, musician, magician, comedian, etc.
A magician's assistant who pretends to be a member of the audience.
One who knowingly allows himself or herself to be used for another's profit; a dupe.
A confederate; a person who is secretly working for the researcher, unknown to the study participant.
A straight man.
A secret informant for police.
To act as a straight man.