evil noun - An ancient Middle Eastern torture method used today by Al-Queida to torture captured US soldiers to death.
A standard torture session should proceed like this:
After hours of trying to figure out why the square root of six equals the product of 2178#$^#21#@*(3.3824, the terrorists unleash a barrage of "simple algebraic equations" to destroy their mind and then beat them with a bag filled with Algebra books. After that, they stab them with a spike dipped in variable poison and shoot them in the dick. It pretty much sucks balls.