To get very excited in a non-sexual way about something, almost as if you had an orgasm.
I had a squeegasm when I realized David Tennant was in Fright Night.
The physical reaction Greek Speak girls and other psycho fangirlies have to watching videos of, or listening to songs sung by Constantine Maroulis.
"OMG! I think I just had a Squeegasm from watching Con sing "My Funny Valentine" for the 10,000th time!"