A person who kills three or more people at different times with a cooling off period in between.

When your so pissed off from losing multiple amount of games that you play worse and worse till your so pissed you begin leaning over your keyboard screaming over every little mistake you make and complaining about gaming imbalances

(Common in Starcraft II)

Some one who hates cereal

A human being, usually an adult white male in his late twenties, who has killed four or more individuals in seperate incidents with a cooling off period in between.

Serial Killers come in several types. There are Hedonistic serial killers, who enjoy causing pain and suffering.

Visionary killers are often psychotic, and beleive they are acting on orders from a higher entity.

If left unchecked, a serial killer may degenerate into a spree killer or mass-murderer, which are entierly different things.

A person who commits a series of murders to a number of people. Many of them are very bright and intelligent. Usually, it is poor upbringing and confusion; that leads them to do these things. (note: I am not dignifying or condoning them.)

A guy who will stab your soda and your like WHY IN THE FREAKING WORLD WPULD YOU DO THAT. Then he says that it’s fun and then he stabs you.

1. Noun version of the perpetual 'be killing'
2. Someone who continuously 'kills' (does beyond well) in their respective field
3. The highest level of perpetual, premeditated awesomeness.