a victim of ridicule or pranks

An assistant you train to pretend to be a 'volunteer' who, once on stage, behaves like Larry, Curly or Moe.

a person of unquestioning obedience

act as the stooge; "His role was to stooge for the popular comedian"

act as a stooge, in a compliant or subordinate manner; "He stooged for the flamboyant Senator"

A person who tells the promoter something that the wrestlers would prefer to keep secret.

A stand-in, a deputy, one who does something for someone else.

a 'guess-man

cruise in slow or routine flights

An entertainer who feeds lines to the main performer and frequently is the butt of the joke.