When someone goes on a ski trip and makes up numerous excuses for why they can't ski properly, they are likely showing symptoms of pussy disease.
Simon: "Hey boys, I think Compo has pussy disease, he claims he can't see properly, his right quad is burning, feels sick, has developed a cough and claims he can't breathe. "
Brad: "yeah, that's pussy disease alright, his cough even sounds like a wild animal.