Sorry for the late response. A labor aristocrat is a worker who benefits materially from white supremacy, colonialism, imperialism, and patriarchy, and therefore identifies more closely with the bourgeoisie than the global proletariat. Compare a cis white male worker with a good easy respectable well-paying job in the imperial core versus a Black trans woman worker working in a factory in a place like Ethiopia. Both are technically workers given the fact that they must sell their labor to capital in order to survive, but I think we can all guess which one is probably more open to hearing about communism.