Yellow Overdrive Power Ranger Ronny seemed to get quite hot and bothered when she saw the zords her team were going to be driving. The fans, of course, latched on to her "zordgasm", and soon put her in a Cargo Ship (with drills, after she had a similar reaction to the Drill Blaster in a later episode).
Stephen Fry has a nerdgasm in this video after spotting a Tesla Roadster in traffic and hearing how big of a touchscreen the new Model S will have in the dash. During his second appearance in the "Star In A Reasonably-Priced Car" segment on Top Gear, he got more than a little excited while driving his fast lap and Jeremy asked him if he'd had a crisis.
Parodied on an episode of Saturday Night Live with a fake commercial for a sex chat line featuring women dressed as different geek icons (including Princess Leia, Uhura, and Galadriel) who speak only in references to their respective works.
On an episode of HGTV's Room Crashers, the host gave a cluttered couple a really cool shelving unit where, upon a button press, their flat-screen TV rose from its hidden compartment. The homeowner squealed "It's so nerdy! I love it!"
Adam Savage of MythBusters plays it straight and references it by name in one Indiana Jones-themed myth when he dresses up as Indy.
In a Ctrl+Alt+DelOmake strip, Ethan is asked whether Nathan Fillion from Firefly was cooler or Batman. When he said that Nathan Fillion should play Batman, he actually "gave little Ethan a healthy massage" at the thought of that.
The comic Little Gamers does this once in a while, such as one of them "excited" from news about the newest iPhone iteration.