I'm pretty far left myself in my way of thinking, and I don't support some people that I would agree adhere to the description of tankie. There's a clear definition, even if it is used in a derogatory way. It's someone who thinks that left ideas should be spread in an authoritarian way. Which, in my opinion, is pretty much the definition of fascism. Power for power's sake, domination just to say they won. Authoritarian imposition of ideology is antithetical to socialism.

Every person that I've seen describe it says some variation of "they're fake marxists that support anything that opposes the west, include fascist and violent regimes." Conservatives use "woke" to refer to anything that opposes christofascist white supremacy, from gay pride parades to a black person appearing in a movie.