when you're excited to learn something new, eg. math, science. it's basically a boner in your brain a.ka brainer.
by soma689 April 25, 2013
Dude1: Hey, man, where's the basement?
Dude2: Try downstairs, bright spark!
Girl: Whales are... big.
Dude2: Try downstairs, bright spark!
Girl: Whales are... big.
by MischiefMaker December 29, 2004
by Little Miss Mayonnaise May 26, 2005
by efulitz January 8, 2004
by TheCurryFairy September 7, 2006
It's when you grab the skin between your hanging balls and your cock and then tighten your grip all the way up to your balls forcing them to really stick out, this makes your sac look veiny and bumpy like the top of a brain.
I asked my girl to examine a spot in my testes, when she came in for a closer look, I tightened up my grip and hit her in the eye with the brainer.
by allen powell January 17, 2006
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