shpadoinkle
An undefined word created by Trey Parker while writing the title song for his student film "Cannibal! The Musical" (It was meant to be only temporary until he thought of an appropriate adjective but it ended up sticking). Can be used in replacement of any adjective or in the expletive.
"That's a shpadoinkle car!"

"Oh shpadoinkle! I have a paper due today!"

There are an infinate number of shpadoinkle examples for this word.