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
Something that strikes a chord in someone's thinking, creating a spur of "enlightenment" and stimulation in knowledge, especially in subjects like philosophy & logic.
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 brain boner.
Peter: Yeah, it was so good it gave me a brain boner.
by nullswitch February 20, 2011
The feeling you get when you are having a lively discussion or listening to an engaging lecture and everything makes sense and it gives you a bunch of new ideas about the topic at hand. The intellectual equivalent of an erection.
DeSean: oh man, that lecture given by Dr. Kobilka about G protein-coupled receptor dynamics gave me a massive brain boner.
Derrick: uhh...right, yeah, totally dude. *pssst* Jimmy, I think we need to re-evaluate our friendship with DeSean...
Jimmy: agreed.
Derrick: uhh...right, yeah, totally dude. *pssst* Jimmy, I think we need to re-evaluate our friendship with DeSean...
Jimmy: agreed.
by Longrod Von Hugedong April 28, 2016
You: Did you guys check out my new 3D TV?
Me: Yeah, major brain boner.
Used when describing something that intellectually "turned" you on.
Me: Yeah, major brain boner.
Used when describing something that intellectually "turned" you on.
by The Comet March 10, 2011