Neji Ki (jap. ネジ切, twist off, twist cut) is an attack where the dog is biting on the opponents neck and makes the same rotary motion.
This attack is really common in GNG, GDW and GDW:O.
This attack is used by Ohu soldiers such as:
Also used in GDR by Shiro and other hunting dogs.
In Shiroi Senshi Yamato there is a similar attack, Kaiten Jigoku.