The resulting event from something so appalling that it actually creates concussive waves of what-the-fuck, with a force sometimes in excess of 30,000 Newtons.
What-the-fucksplosions were iterated everywhere when all of the earth's water suddenly turned into bears.
Derives from the term "Fuck knows", which is another form of "God knows".
Used to describe someone who has led a sheltered life or is blissfully unaware of current events.