I was listening to NPR this morning, and there was a bit talking about neologisms in the year 2005, and they touched on "cromulent" as a word that's on the edge of mainstream usage, having been used on The Simpsons.

That led me to this page:
http://en.wikipedia.org/wiki/Cromulent

which is a list of Simpsons coinages. Good reading for a slow work day.