The state or condition in which one is feeling "Extra" flabbergasted.
"Upon seeing a fellow human in a grocery store, wearing a yellow unitard with no underwear, sporting a giant moose knuckle has left me in a state of flabbergastion."
"People that act like douchebags often leave me in a state of flabbergastion."
12 step recovery jargon referring to someone new who talks about how great life is, now that they're sober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.