(noun)-To kill 4 or more people with a Plasma Sword in Halo 2 in rapid succession, can also be accomplished with a Brute Shot or any other weapon, but it is much more difficult.
Performing a whacktacular proves you are a top of the line player
Holy hell, I just overboarded every single one of those bitches with my sword, what a whacktacular!
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.