A person who is very intelligent but very stupid at the same time. The person can be a genius but can have tendencies to not figure out the simplest terms. The person is good at school but lacks real life skills. However the person is very reliable, humble, helpful and is always a good person who can make the most out of a bad situation.
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