1. One who is not smart in school but smart in life though never showing it.
2. One who is very smart in school but never show's their true potential.
Person 1: Hey, what's wrong?
Person 2: Well my parents are getting a divorce....
Person 1: Its ok, things like this happen, you just gotta cheer up and move on.
Person 2: Thanks man!
later that day....
Person 2: What did you get on your algebra test?
Person 1: A D-....
Person 2: Dude, you're such a closet genius.