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A feeling of intense, almost sexual, joy that a nerdy person gets from something that people on the Autistic Spectrum usually love, such as trains or weather.
On the TV show, "The Big Bang Theory" the character Sheldon frequently has Aspiegasms about geeky things.
When I offhandedly mentioned to Brian that my train was in the middle of the road, he had a total Aspiegasm, squealing "Ooh, street running! Take a picture, take a picture!"
by Pete Theroux January 02, 2012