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"Tankies"
(redsails.org)
According to how I see it used online, a "tankie" is essentially a socialist that reads and understands theory, historical and material dialectics.
I am a tankie.
Anyone who walks the path of reading theory and taking it seriously will doubtless be labeled one by those who haven't read theory, presuming they actually try to correct misconceptions and relay knowledge of theory.
Technically it originally was used against British Communists supporting the USSR putting down a color revolution in Hungary.
Rules TBD.