The gayest shit ever. For people who have nothing better to do than put yellow bandannas on and run around throwing socks and each other.
This is what people do in college who don't drink, dance, work or do anything a normal person would consider socially acceptable.
The death of a college campus for a week.
Person 1: Why are all these retards running around with bandannas throwing socks?
Person 2: It's humans vs zombies
Person 1: Damnit, I hate nerds.