An extremely serious medical condition, in which the sufferer is compelled to Jack Off. This is a very dangerous condition that may lead to death, possibly by drowning in Jizz. The affects of this condition can last for up to 2 weeks. Scientists are working of a cure, but as of yet there is no cure or treatment.
Person 1: Hey do you know why will was ill?
Person 2: Yeah, he had The Horn.
Person 1: Oh shit! is he gunna be ok?
Person 2: They're not sure. He has been in hospital for the last 4 days, they just can't seem to get him stop it. There's not much hope.