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 12, 2010

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

by Sam Ashby January 05, 2009

Pedro's reaction to winning the lottery was flabbergasmic
by drellaluna565 December 14, 2008

by Howudern January 25, 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 07, 2009

I fired up the Skeezmobile to get Chris to the nearest BBQ Handjob Dispensary so he could enjoy the soothing sound of a Flabbergasm later in the privacy of his own home.
by NippleAntennae March 17, 2021
