1 definition by Three years later
The satisfaction you get when learning something you didn't know before or to share something else with someone who didn't know about it before. Like a boner, but with your brain.
Mary: John must be the most common name in the world.
John: No, Muhammad is the most common name ever.
Mary: Oh. I didn't know that.
Tommy: Total brainer.
John: No, Muhammad is the most common name ever.
Mary: Oh. I didn't know that.
Tommy: Total brainer.
by Three years later July 15, 2010