n. The result of bringing a sexual partner to climax with the intensity to cause a seizure. Usually the result of the proper use of a choad and avoidance of cocksphixiation.
also: the moments following "Oh my god, oh my god, oh my god..."
usually seen in the "high end" porno industry
"I thought that I killed her until I found out it as just a seizgasm."
"Seizgasm!!? I rolled over and got the remote stuck up the crack of my ass!!! Get that picaco out of here!!!"