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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, 2003
by Little Miss Mayonnaise May 26, 2005
by efulitz January 08, 2004
by TheCurryFairy September 07, 2006
A Brainer is when you do something because it had to be done and you knew it was the right thing to do.
by WolfBrother13le April 24, 2013