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.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.