Coinage for climactic pleasure derived from accomplishing an act or action one finds personally gratifying. The Riddler (Jim Carrey) exclaims the word in Batman Forever (1995), when blowing up Batman's cave.
"When I played Resident Evil 5 for the first time, I absolutely joygasmed."
A moment of intense, unfiltered joy or passion, with or without sexual thoughts/feelings involved.
"There was a simultaneous joygasm when the tour group was allowed to pass the area where there has been a pile of corpses shortly prior to their visit after a wait of 6 hours."