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the phenomenon whereby the anus possesses it's own brain and makes it's own decisions.

brain + anal = brainal
You are walking home and the urge to shit hits you, the brain in your head tells your anus to tighten and you continue walking. You are doing very well until close to home when all of a sudden you're scrambling for your keys and fumbling to open the door, running to the toilet whilst undoing your pants and just making it in time (or sometimes not making it).

This situation occurs because the brain in your anus overrides the brain in your head. Despite your best efforts to clinch and tighten, your brainal can sense when a toilet is near and immediately starts to open the brown gates.

"the ass always knows"
by reuben teuge February 24, 2010
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May 28 Word of the Day
A goth who has been part of the subculture since it originally came about, or a goth over the age of 40.
by Solinium May 30, 2008
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2
When you hear something so intellectually stimulating it feels like your brain is being penetrated
Russ: "I wanna fuck the shit of you ... mentally"
Girl: "Yes please brainally penetrate me daddy"
by Joosy May 05, 2018
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3
When you hear something so intellectually satisfying it feels like your brain is being penetrated
Russ: "I wanna fuck the shit of you ... mentally"
Girl: "Yes please brainally penetrate me daddy"
by Joosy May 05, 2018
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4
When one is skull fucked beyond comprehension - thus taking part in the act of brainal.
"Ah man did you hear about that lass that Callum gave brainal?"

"Yeah I did, she had a concussion for a week!"
by Derivedminds September 30, 2012
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5
When an intellectual makes you think so hard it feels like your brain is being penetrated
Russ: "I wanna fuck the shit of you ... mentally"
Girl: "Yes please brainally penetrate me daddy"
by Joosy May 05, 2018
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6
Nietzsche: GOD IS DEAD!!!!

Jimmy Neutron: Mind-Fuck!!!!!!!

Nietzsche: Srsly...

Jimmy Neutron: BRAINAL!!!!!!

*head explodes and sprays copious amounts of shit and jizz across the walls, and a little trickle lands on Nietzsche's Uber-Stache...

Nietzsche: Hmmm....

*Tongues his 'stache suggestively.

Nietzsche: Bon appetit
by The chudgargler March 08, 2010
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