A person who took one class in virology and now claims to be an expert in all things pandemic-related. Also, a person who catches viruses of the sexual variety and exclaims "gotta catch 'em all!" when diagnosed with a new one.
Yeah, that dude was in my class last semester. He's a total virologist.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi