A satirical film directed by Mike Judge released in 2006 starring Luke Wilson and Maya Rudolph in which <spoilers> Joe Bauers (Wilson), an Army librarian, is judged to be absolutely average in every regard, has no relatives, has no future, so he's chosen to be one of the two test subjects in a top-secret hibernation program. He and hooker Rita (Rudolph) were to awaken in one year, but things go wrong and they wake up instead in 2505. By this time, stupid people have outbred intelligent people; the world is (barely) run by morons--and Joe and Rita are the smartest people in America
Guy #1: Dude, did you see Idiocracy yet?
Guy #2: Go away, I'm batin'!
What Jennifer and Mel (the first two people two write a definition for this word) are afflicted with. Idiocity is what causes them to be idiotic. (Actually it's a pretty useless "word", and seems to be an overcomplicated substitute for idiocy, but whatever.)
Mel: Here is an example of 'idiocity' in which idiocity is an adjective - "Jake has a severe chance of inheriting his mother's idiocity."
Me: You idiot, that would make it a noun, for it to be an adjective, it would have to read, "Jake's mother is idiocity.", which doesn't make any sense. Man you have a severe case of idiocity.
Jennifer: Hi, I can't find the 'D' key on my keyboard, so I'll just type a 'C' anywhere there is a 'D'...
Me: I have never witnessed such idiocity.