Zombieland

Two months have passed since a strain of mad cow disease mutated into "mad person disease" that became "mad zombie disease", which overran the entire United States (with the infection presumably spreading to the rest of the world), turning many Americans into vicious zombies. Survivors of the zombie epidemic have learned that growing attached to other survivors is not advisable because they could die at any moment, so many have taken to using their city of origin as nicknames.