when you're excited to learn something new, eg. math, science. it's basically a boner in your brain a.ka brainer.
professor farnsworth: all of this knowledge is giving me a raging brainer!!!
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A dumb question or response. Something one shouldn't even have to think about it.
Dude1: Hey, man, where's the basement?
Dude2: Try downstairs, bright spark!
Girl: Whales are... big.
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Not needing a brain to operate task in question
Hey, working a till in Macdonalds is a no brainer which is just as well as chavs need the work
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Something so obvious to be correct/appropriate, that it requires no contemplation to decide on.
It was a no-brainer for Zack to wear a condom when he banged that disease infected whore (ewwwww).
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Slang for someone who gives oral sex
"Yo you know Shayna's a brainer right?"
"Word?"
"Ye man; go chop dat"
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A Brainer is when you do something because it had to be done and you knew it was the right thing to do.
Brainer
1.You gave that guy some of your bone marrow well that's a brainer.
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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.
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