Define Get Brain Meaning

From a news source:
The advertisements that ran on about 200 buses across the city in recent months carried posters displaying a suggestively posed woman in hot pants kneeling among a pile of books beside the snappy slogan "Read Books, Get Brain."

She was good to go, so I knew I was gonna get brain that night!

She gave me brain in the bathroom.

I get brains from that biatch every night.

I was getting brain from the girl in the passenger seat.

Chelsea was getting brain in the backseat of her car.
Ruben was getting brain in the backseat of his car.

I got brained by that bitch last night...

Ayo man, that Akademiks ad said if I read books I'ma get brain, b! You see that? "Read books, get brain". That ill wops homie! Watch I'ma go read something now.

Have you ever popped champange on a plane while getting some brain?

Whipped it out, she said "Oh, I've never seen Snakes On A Plane!"

-Mr. West

when i closed the patient up, i left a saw inside; i'm going to have to get a new brain, or lay off the PCP!!

-going to hit a yard sale and get me a new mind!

she needs to get a new brain!!

-this brain won't 'hop' when i bark orders, i need to get a new brain!