Zombie Outbreak Resistance Tactician. Generally used to refer to anyone who has studied zombie survivalist theory. Typically refers to a member of a large web based organization known as OZORT that can easily be found on any search engine.
by Edward Stevens August 26, 2006

The full name for a virus most commonly referred to Lyssa X or Rabies X. The ultimate rabies virus, with an incubation period of only a few days, rather than a few months. A member of the Lyssavirus Genus along with rabies, Lyssa X is a biohazard nightmare.
Lyssavirus X is a basic mutation of rabies that could easily wipe humanity off the face of the planet.
by Edward Stevens August 26, 2006

Lyssa X (noun): Lyssa X (also called "Lyssavirus X" or "Rabies X") refers to a mutation of Rabies with a much shorter incubation period of several days, as opposed to several weeks. Rabies, one of many similar viruses in the Lyssavirus Genus, is characterized by causing those infected to become highly aggressive, irrational, and unresponsive to attempts at communication. Other than its rapid onset, Lyssa X is otherwise identical to Rabies. Rabies is kept from rapidly spreading because it can take anywhere from 3 weeks to 2 years to affect it's host, but Lyssa X has overcome this limitation. The term Lyssa X was originally coined by OZORT, and is considered a fictional virus. It is also considered a zombie virus by zombie survivalist groups, as this mutation could very easily lead to a widespread zombie outbreak.
"Lyssa": Greek, Frenzy
"Lyssa": Greek, Frenzy
by Edward Stevens August 25, 2006

Noun (zee day): A term probably coined by Max Brooks which refers to the war between zombies and mankind. Derived from the word D-Day, which is a British term used to refer to a variable day on which a combat attack or operation is initiated. Z-Day is marked by a sudden attack on mankind by zombies, which will lead to a widespread zombie outbreak. There are a number of zombie survivalist groups worldwide (largely in the US, UK, and Canada), that are already planning what to do when this day comes.
Z-Day will catch mankind completely off guard, and the lack of preparation will lead to countless casualties.
by Edward Stevens August 26, 2006

A Theoretical Virus is a fictional virus that is based on a real virus, but does not actually exist. They are used as a benchmark for viral preparedness. A good example of a theoretical virus is lyssa x, which is a relative of rabies. Web groups such as OZORT are geared toward preparing for worst case scenario viruses like these.
by Edward Stevens August 29, 2006

"Lyssa" comes from a Greek word meaning "frenzy". It is a genus of viruses in the Rhabdovirida family that is characterised by it's ability to drive its victims into a mindless uncontrollable fits of fear and aggression (this includes humans). The most well known of member of this virus is Rabies. There are numerous members of this group, such as Mokola Virus, Duvenhage Virus, Irkut Virus, Khujand Virus, as well as the theorietical virus, Lyssa X.
by Edward Stevens August 28, 2006

A virus that does not actually exist, but is a possible mutation of an existing virus, or an entirely made up virus that can possibly exist without defying medical knowledge. Examples of fictional virus include Lyssavirus X and Filonecrosis. The movie entitled "Outbreak" was a good example of a fictional virus.
Despite the fact that they don't exist, it's important to be prepared for fictional viruses, since viruses are known to mutate to more potent forms all the time.
by Edward Stevens August 26, 2006
