That feeling of outrageous, hilarious shock one feels at the moment something beyond unbelievable comes out of nowhere and slaps them in the head. It makes you laugh when you finally catch your breath.
I was unbelievatated when I saw that my daughter was eating a sandwich as big as her 7 lb newborn baby's head!
The result of a dumb person putting an extra E in the word "Unbelievable". This can come from careless typing, overall stupidity, or possibly a bad translation. But, some people may look this up on purpose. If you did, I don't know what to say to you.