There is on the DLC (they don't have it on here, including Nuketown) On the DLC zombies map Origins and Mob of the Dead, there will occasionally be a big zombie that will tear through your ammo to defeat. the higher the rounds, the more big guys there will be. The big Zombie on origins is a little different though, it can grab you and\or shoot flames everywhere. that's why I want DLC on her so bad