noun

• (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.
  "Russian Twitter and Facebook bots trolled both the left and the right with agitprop — in what appears to have been a general effort to deepen divisions and sow political chaos in America, not to favor one party or candidate over the other."
• (countable) An instance of such propaganda.
• (countable) An organization or person engaged in disseminating such propaganda.

verb

• (ambitransitive, politics) To disseminate (something as) political propaganda, especially communist propaganda, through art, drama, literature, etc.
  "Anyone who has seen a class struggler at work, agitpropping around Union Square, or the back streets of the Loop, realizes that, by the very nature of things, he or she is so possessed of that particular barricading dream as to lose touch with all reality, [...]"