When a science person experiences and/or expresses vocalisations (vaguely human) to a positive outcome of a major or minor (depending on propensity to having nerdgasms) scientific endeavour, the are said to be experiencing a nergasm. For example, the flyby of Pluto by New Horizons spacecraft spawned frequent, vocal and even multiple nerdgasms in the nerd community.
Did you see that picture of Pluto? Did you see that? Did you? OMG I just had a multiple nerdgasm. OMG, there's more? I'm having nergasms!
Something that happens to me every time I open up visual studio. I happen to be one who is described as a nerd...
Me: OMG NERDGASM!!!!!!1!!!!1!
Me: Dammit gotta wash the sheets again...
The intense feeling of joy a nerd feels when he or she plays World of Warcraft (WoW) for the first time.
Holy shit! Ted just got a nerdgasm!
To spontaneously throw one's Yu-Gi-Oh! cards in the air after seeing or hearing something that tingles their nerd-senses
Melvin: Oh, gee golly... The new X-men game is out for all consoles!!
Heimlech: !!! OMG!! *nerdgasm*
my reaction to finding out about google instant
When I discovered google instant, I had a hardcore nerdgasm
When one experiences subsequent events of nerdiness, fandom, or geekiness that causes a sensory overload, loss of bodily functions, and a climax deep within the brain, in the section that recognizes specific information concerning comic books, occult television shows, video games, or electronics that only a specific section of the population would actually know about.
Oh my God! The secret scene at the end of Iron Man gave me a total nerdgasm!
Ming-Na Wen's profile picture on Twitter @MingNa is the definition of Nerdgasm.