When someone who doesn't appear to know anything about sex surprises you by rocking your sexual world and giving you an amazing orgasm.
"I kind of hooked up with Lenny this weekend." "You mean the band geek? Really?" "Yeah, but he knew how to do some things that i never would have guessed. He gave me a flabbergasm."
by DJ D-rake the leaves December 10, 2010
by Sam Ashby January 05, 2009
by Howudern January 24, 2011
When you are so bored that you think you could die, and suddenly you get a huge adrenaline rush, usually when you get an idea of something you could do instead of being bored, but it goes away almost instantly.
He was was sitting on the couch when out of nowhere he had the most amazing flabbergasm. But it didn't last...
by Eqo May 04, 2009
overwhelmingly tingly sensation experienced by a fat person jiggling their bellyfat at a resonant frequency.
The coroner's report said the 400 pound man died of a cardiac arrhythmia while giving himself a flabbergasm in front of his computer's webcam.
by overdogg March 18, 2015