Country Dictionary

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.

A question with an obvious response.

Dude 1: Will you take the money?

Dude 2: Yes I will! It's a no brainer.

The act of using your brain to make a decision.

It was a brainer to watch SourceFed.

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."

When you think about a decision and make the right choice. Like a no-brainer but better.

The decision was a brainer

a girl who sucks dick (gives brains)

that nasty hoe is a brainer too

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!!!