Noun: someone of low intelligence who is a hopeless pawn of mind control (AKA mainstream media and Pop culture).
The word is a mix of MKULTRA (a U.S. government mind control program) and Trick (a slut or whore; an "easy ride" as they say). Basically it's like calling someone a whore of the system.

A similar slang pejorative term is "Pop Tart."