a boner you get while reading erotic material
i figured out to add intellectual boner to urban dictionary afer reading the little novel in the horny definition...dunno why
1. when you suddenly get a boner while thinking hard about something
2. when you get a boner when a smart and/or good-looking girl answers a question in class.
1. One year, when I was filing my taxes, I got an intellectual boner.
2. She always answers questions in class and I get an intellectual boner.