A sudden, intuitive perception of or insight into the reality or essential meaning of something very basic, annoyingly obvious, or - in hindsight - really stupid. The person having the stupiphany is generally greatly excited, while observers just shake their heads at how obvious the answer was.
It dawned on Dan one morning as he was driving that the word windshield was made up of the 2 words describing what it did: "I've had a stupiphany!" he ejaculated!
Maria's latest stupiphany came when she looked up Men At Work lyrics and realized it was "a vegemite sandwich" instead of "a bite of my sandwich" in the song Land Down Under.
After several years of training/certification, Seth suddenly realized that CPR was really just manually activating the heart to pump blood: it was a real stupiphany.
When someone stupid thinks they're having an earth-shattering epiphany that is in fact so incredibly moronic, asinine and just plain retarded that you have to bite your tongue not to scream, "Are you stupid!?" It's actually a stupiphany.
"Oh, you know what? Do you think maybe the reason my Windows password won't work is because my mouse cord is touching my keyboard...?" (-some rocket scientist enduser)
"...And all of a sudden I just thought, oh my goodness, I shouldn't reach my arm up so high since I'm pregnant!! It'll pull on the baby's umbilical cord so tight and strangle the baby..." (... because we all know the umbilical cord is directly attached to the mother's armpit!?)
Him: "'Riding dirty'? Does that mean he hasn't showered today?"
Her: "No, Jason, but I think I've just had a whipiphany. I think that means he has an unregistered weapon."