Something that strikes a chord in someone's thinking, creating a obsession of "enlightenment" and stimulation in knowledge, and gets obsessed in his/her thought pattern until his / her thought/idea wears off or the thought gets put into action.
John: Hey, have you seen that recent philosophical discussion between XXX and YYY on YouTube?
Peter: Yeah, it was so good it gave me a blue vain brain boner.
Peter: Yeah, it was so good it gave me a blue vain brain boner.
by Slim and Gee Production March 30, 2011
The phenomenon when a males mind becomes filled with extremely sexual thoughts when one has a boner. In other words a person thinks with their boner.
I had a serious case of boner brain in class and almost spunked my pants thinking of fucking Ms. Williams
by TadBitOfThad May 10, 2015
When ones intelligence level decreases as blood flow levels lower in brain to accommodate the needed increased flow to the penis during a erection.
by JDiddy2Pretty September 27, 2015
when one has the inability to speak or function because all of the blood has rushed out of their head to their boner. generally makes the affected person very stupid for the duration of the boner. mainly occurs to men with large schlongs.
"she told me i could touche her boobs and i wigged out, i think i said 'i don't need to.' I NEEDED TO."
"Total boner brain dude, ouch."
"Total boner brain dude, ouch."
by twiceonsundays June 3, 2011
When your boner takes over thinking for your brain. Similar to the Blood-Brain Barrier where only certain substances can pass through to the brain. The Boner-Brain Barrier doesn't allow any thoughts to be processed from the brain since they are all processed from the highly sophisticated thinking center of the penis. This can result in making illogical decisions and having regrettable sexual experiences.
by The definer2017 January 19, 2012
The intense climatic feeling of exhilaration encountered when stimulated beyond arousal of the intellect; a hyper-focused state of mental masturbation.
He / She's got a Brain Boner for it, I can't believe how long he / she's been {watching, reading, listening, etcetera} this.
by Reibesac July 12, 2017
An idea.
I had a raging brain boner the other day. Space Suits for cats is a good idea, and don't let anyone tell you otherwise.
by earlgreytea23 November 24, 2018