"Tankie" is a term that was originally coined (ironically, by Marxist-Leninists themselves) to describe members of the CPGB (Communist Party of Great Britain) who justified the Soviet Union's invasion of Hungary in 1956. It has since become a catch-all term used to describe (self-described) leftists that slavishly adhere to the propaganda of or justify the actions of authoritarian regimes that are (or are perceived to be) "socialist" such as China or (bizarrely enough) modern-day Russia.