The complete and utter opposite of an orgasm, in which one's erect penis becomes completely flaccid and limp. Often used as an exclamation of surprise and disgust at something completely un-arousing.
Guy 1-"Dude did you see Julie last night at the club?"
Guy 2-"That fat bitch? You're into her? FLACCIDGASM!"
Guy 2-"That fat bitch? You're into her? FLACCIDGASM!"
by TheSophistrator April 14, 2010