

“Tankie” means “person who, in a confrontation between citizens and tanks, roots for the tanks”. It’s more a reference to a person’s underlying authoritarianism rather than communism per se. The main reason it’s conflated with communism/marxism is because capitalism has, conceptually, staked a claim to the protectorship of individualism, which is assumed to be desirable. And because this claim is unchallenged, anything which stands against capitalism is assumed to therefore be inherently authoritarian. There is some merit to this claim and these assumptions, but to what extent, I couldn’t say. I’m not that smart.
I assume that’s a reference to the intro screen to Mario 64 where you can pull and deform Mario’d face.