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brain ghost

A figment of one's imagination which occurs as a result of one's brain filling in gaps in information unnecessarily.

They can be sights, sounds, tactile sensations, or even an uncomfortable feeling a presence. They are distinguished from ordinary hallucinations by the fact that all people are prone to these phenomena, and the person need not believe the brain ghost to represent reality, although some do.
A person's blind spots are an example of a brain ghost.

"I was alone in my house when I felt the presence of a ghost."
"Ghosts don't exist; it must have been a brain ghost."

"I thought I heard a baby crying, but upon realizing that I was alone, I realized it was a brain ghost."
by Maninorange January 1, 2012
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brain fuggler

by sabastard September 3, 2009
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Boner-Brain

When ones intelligence level decreases as blood flow levels lower in brain to accommodate the needed increased flow to the penis during a erection.
I can't do math right now, I totally have boner-brain.
by JDiddy2Pretty November 11, 2015
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toss brain

noun, derog. an idiot, literally a wank brain or a person whose brain is capable only of masturbation
"Stupid toss brain can't count his nuts twice and get the same answer."
by kiwimich January 30, 2006
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brain ninja

Title given to girls by comedian Dane Cook. Girls have the power to fuck with a guy's mind by saying something so simple that it eventually drives them crazy.
Girls are brain ninjas! They know how to get in there with their katanas and cut ya! And then disappear into the night!
by brainninja14 December 1, 2009
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Fart Brain

1. Someone who's head is devoid of nominative brain tissue. Similar to the more common air head the cranium of the subject contains nothing but gas. However in this instance, the gas inside the cranium consists mainly of stinky gut methane.

2. Someone who consistently brain farts.
"I admit that I slept with your best friend, honey but honestly, it didn't mean anything."

"Why don't you just fart off, fart brain?!"
by deadestfish May 3, 2009
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brain pan

A motorcycle helmet. Specifically the kind that just covers the top of your head. They are mostly sported by riders on top of a American brand motorcycle, chiefly, Harley Davidson.
Hey Pete, good thing you were wearing your brain pan when that car slammed you. Your face is a mess but at least you can think straight!
by WindowLicker9000 April 11, 2010
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