It originally was used to describe Leftists supporting authoritarianism while claiming to be leftist. It was used originally to describe Marxist-Leninist members of the Communist Great Party in Britain who supported the use of tanks by Soviets to quell a couple of uprisings in the late 50s and late 70s.
And history proved that support to be 100% correct given what those uprisings were. Have you ever actually looked at who was riling it up (gladio implanted fascists), who backed them and who was coordinating it? The US and CIA played a huge role.
It's fucking weird that this gets brought up as some huge gotcha thing by people when the supporters have been shown to have been historically correct in their decision. It was unpopular and split a lot of parties but they were on the right side ffs read a book.