Someone who does not believe in regular bathing, or, a person whose body odor develops before they can bathe again. Also a good insult for somebody you dislike that is in either of the former categories above.
Hey, look! It's the Ignorant Dude who Smells Like He Took a Bath in Dead Fetus Juice!
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