The cynic hates other people's idealism, seeing it as softness. Cynicism is therefore a form of political passion that claims dispassionateness. It thinks of negativity as realism and reason.
But it's kidding itself. In order to endure as a believer, the cynic disavows its own belief in belief, its own earnestness. Zizek, citing Slotterdijk, says that the cynic projects belief in itself and lives as if the world could have corresponded with its projections and fantasies. It's a world of engaged disappointment and fury. Talk about a Department of Defense!
Figures that it's from the Greek, "dog-like": you know that Feeltank would never go there.