An undercover informer.
One who ropes goods; a packer.
Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”)
Any of a variety of monsters with tentacles that they use to capture victims.
A person hired by a gambling establishment to locate potential customers and bring them in.
A secret informant for police.
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.
To act as a straight man.