Posers, in any shape or form (these people are prone to saying mean things about others to show their perceived superiority, i.e, making fun of someone's lack of intellectual prowess, "lesser" possessions, looks/clothes, different opinions/political views, etc.). The real justice, however, is that posers are insecure and will never be happy/satisfied.

People who are "retired in place" and refuse to do work commensurate with their pay. Then they nose into and criticize others' work.