I'm pretty good at picking things up from context, so I'm gonna say a tankie is someone opposed to the deployment of tanks against a captive civilian population, the police having tanks, and tanks' worth of tear gas being used on peaceful protestors?
(please don't reply with earnest answers to my question, thx)
EDIT - some of y'all are failing to follow this last instruction smdh
During WWII, USSR armor crews, in their patriotic zeal to defeat Nazism, voluntarily took estrogen which was thought (and was later proven) to increase combat capabilities. These trans supersoldiers were the first to liberate Berlin. Thus we to this day call estrogen tank-E in their memory
Red Army tanks enter Berlin: