The concept that exists just to make people in Algebra 2 die of confusion.
"How does this pointless stuff that I'm not even going to use when I'm older even make sense? I just don't see how there can be Imaginary Numbers!"
(dies in class)
Another term for a brain explosion from attempting to process very abstract material.
The last time I saw Johnny before his brain exploded was the first day of school before 2nd period when he went to his AP Physics 1 class.