Fungus that develops on the penis after having deviant anal intercourse with a partner who has contracted Sarnac. Often the penis will become rotten and ooze puss. May lead to Benoit
"I shouldn't have had butt sex with that whore because her Sarnac gave me Schlitz Schlong."
ayon kay Goob, Cole, & Galoot ika-03 ng Agosto, 2007