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.
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could be used as in "definetly" or "of course"
Jim: Do you have to put your marshmallow in the fire?
Clark: Dude, it's a no brainer, as a rule of thumb campers should put their marshmallow in the fire.
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A question with an obvious response.
Dude 1: Will you take the money?
Dude 2: Yes I will! It's a no brainer.
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The act of using your brain to make a decision.
It was a brainer to watch SourceFed.
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An easy decision made using the brain. As opposed to a 'no brainer', an incorrect term seeing as how all decisions are made using the brain, as pointed out by SourceFed's brilliant Joe Bereta.
"I could save that man's life with a simple marrow donation, it was a brainer."
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When you think about a decision and make the right choice. Like a no-brainer but better.
The decision was a brainer
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a girl who sucks dick (gives brains)
that nasty hoe is a brainer too
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