fungal infection

an infectious condition consisting of a parasitic fungus.

"put your cock away bro, why does that thing have mushrooms growing on it dude, that's honestly really grody"
"please Murray, I don't want to see that thing"
"dude, this is a school, put that away before someone walks past"
"dude, that's a legit fungal infection, thank god you haven't been able to transmit it"