TERF (trans exclusive radical feminists) are basically transphobes who say “trans people are bad for women rights”.
Tankies are a bit more vague in usage. But basically these are self proclaimed socialists who are actually more into authoritarian leaders. They will appreciate Stalin for everything he did and defend North Korea’s political system. Sometimes even praise China and Russia for being “anti-imperialist”. So they have all the social backwards ideas, even more so than TERFS because why would they be feminists.