Definition of agit prop:
(n) :
Alternative form of agitprop. [(uncountable, also attributively) Political propaganda disseminated through art, drama, literature, etc., especially communist propaganda; (specifically, communism, historical) such propaganda formerly disseminated by the Department for Agitation and Propaganda of the Central Committee of the Communist Party of the Soviet Union.]
(v) :
Alternative form of agitprop. [(ambitransitive, politics) To disseminate (something as) political propaganda, especially communist propaganda, through art, drama, literature, etc.]