Proboscaorrhagia
Extreme blood loss through the nose; compared with epistaxis which is the medical term for a simple nose bleed. A fake medical term used by manga fans to describe the kind of massive blood loss exhibited by characters who are exposed to unexpected erotic or sexual topics and/or situations.
Doctor: "Your son is suffering from proboscaorrhagia."
Mom: "Is it curable?"
Doctor: "Yes. Just take away all of his porn and he'll be fine."
Mom: "Is it curable?"
Doctor: "Yes. Just take away all of his porn and he'll be fine."