A sore someone aquires on the lips or tongue from eating too much hot pussy.
Person 1: Hey, what's that on your lip?
Person 2: Oh, that's just a friction burn.
Person 1: A friction burn?
Person 2: Ya, I got it from eatingtoo much hot pussy.
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