An intriguing natural phenomenon and a level of exaggeration not known by humans applied on the word 'interesting'. It's when you try to act excited, however you fail so badly that your word crosses over into the quantum realm.
It usually occurs when being forced to talk with a nerd. There is almost no evidence of its occurrence since 1235ad
Adam: So that's part 3 of my yu gi oh card collection, now to part 4.
DAVE: woh gnitseretni...