on lemmy it is, on reddit its used to describe both the hard left and usually to describe people ina specific sub, where they act as the "moral " center of that city/location that nobody wants thier opinion on, often time its been taken over by tankies of that city/location or conservatives. (such as fare inspection, jury duty etc, they act all holier than thou you should do the right thing, and would immediately try astroturf you if you offered oppoite opinion)