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A "Brain Sister" is a girl who wears glasses and finished high school. However, there is some debate as to whether or not a "Brain Sister" actually wears glasses.
"She was only twentyseventeen, she was a lonely beauty queen, she was a brain sister, Texas Instruments all day..."

Quoted from the Limozeen song "Brain Sister"
by Garboth March 19, 2008
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Soap used for cleansing the brain of a disturbing image or words that just wont leave.

Can also be spelled without a space, as Brainsoap
"I think i need some serious brain soap after seeing that"

p1-"That image is now forever burned into my retinas... "
p2-"Not with brain soap!" *hands brain soap*
p1-"ahh brain soap"
p2-"so what was that image?"
p1-"what image??"
by Yaku Leslie-Draco Drespeire March 10, 2010
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Look inside and you will see
The words are cutting deep inside my brain
Oh they're burning, quickly turning
Knife of words is driving me insane
Insane
Yeah, yeah

Raven black is on my track
Please show me how to neutralise the knife
Show to me in surgery
The art of fighting words to conquer life
Conquer life
Yeah, yeah

Ooh baby, I can rock and roll
Ooh baby, get out of my soul
Now the wicked lance of fear
Driven from my heady mouth and brain
Crash course in brain surgery
Has stopped the bloody knife of love again
Yeah, yeah, yeah
by Death Menace September 29, 2022
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Brain Slug

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An idiot to the infinite power. Someone so stupid that even being in their presence can make you stupider. Worst part about a brain slug is that they don't know how stupid they are/sound. They may often use large words to appear smart

Warning....If you are in the presence of a Brain Slug don't engage them in an argument, and/or a conversation JUST LET IT GO.
Reggie: For 20 pts what is 10x1?

Brain Slug: Well seeing as they can be reciprocals of one another I'm going to change the problem into what is 9x2 which the answer is 18

Reggie: What you've just said is one of the most insanely idiotic things I've ever heard. At no point in your rambling, incoherent response was there anything that could even be considered a rational thought. Everyone in this room is now dumber for having listened to it. I award you no points, and may God have mercy on your soul.
by Mayor McCheesenstein July 15, 2013
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brain snap

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the term used by famous people (and normal people) to justify doing something really stupid that if they'd taken half a second to think about it they probably wouldn't have done it anyway. it's a cheap way of saying sorry for doing something dumb and not taking any slack for it.
the famous celebrity phone throwing incident that everyone knows about - headline of paper "how my brain snapped"
by trinie July 31, 2006
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brain surgeon

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Sarcastically applied to someone who makes a dumb mistake.
"You threw away the winning ticket?! Way to go brain surgeon!"
by tho3m December 30, 2009
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brain strain

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something that causes your brain to hurt..over stressing your brain
OMG that biology test gave me a major brain strain
by blaisey mcg December 9, 2008
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