Taking a shit in a rival academic's ear. Leaving a steaming load on another scholar's auricle, canal, & eardrum. Compare to the more well-known Dirty Sanchez.
After the heated panel on social capital at APA, Dr. W put his myopic and stubborn rivals Dr. A and Dr. M in their place by administering a Dirty Holbert to each of them in the convention center lobby.
Like a zombie but faster, smarter and they live in the forests or underground. The term is used to describe when you are so scared in the wilderness that you start to think that actual half beast half human zombie creatures are going to prey upon you and your companions.