WordNet (r) 3.0 (2006):

stooge
    n 1: a person of unquestioning obedience [syn: flunky,
         flunkey, stooge, yes-man]
    2: a victim of ridicule or pranks [syn: butt, goat,
       laughingstock, stooge]
    v 1: cruise in slow or routine flights
    2: act as the stooge; "His role was to stooge for the popular
       comedian"
    3: act as a stooge, in a compliant or subordinate manner; "He
       stooged for the flamboyant Senator"