I find that when people use this term I get suspicious. It could be used to describe authoritarian Stalinists, Maoists, Marxist-Leninists, or just communists/socialists in general. I wish that posters would be more specific, because everyone and their mother has a different definition of "tanky". It often comes across as a thought-terminator. I'm not up to speed on the Lemmy beef, so I have no idea who's right, but I've seen like 10 posts about tankies and none of them really defined the term, which is very frustrating.