A condition in which a one's penis feels like it's going to fall off (or in rare cases, actually does fall off), especially after excessive masturbation or an intense sexual experience.
Friend 1: "Dude, my dick feels like it's going to fall off!"
Friend 2: "Well, that's what you get jacking off five times a day."
Friend 1: "I guess, man. Severe dixhaustion!"