Brainus 

The word to describe the combined body part created when one shoves their head up their ass.

He's got NO I.Q., he's a walking brainus.

Brainus by Phuqit November 12, 2006

Brainus 

One of three categorizations of an answer (other two: anus and brain--see definition); meaning you are not 100% certain that your answer is 100% true

"Lions can run 100 mph."
"Brain, Brainus, or Anus?"
"Ummmm, Brainus."

Brainus by spintas July 28, 2012

Brainus 

The region of the brain where ideas or thoughts of utter stupidity are formed.

Tom's decision to wear a leisure suit to his father-in-law's funeral clearly came out of his brainus.

Brainus by Antonym Antony February 20, 2011

brainus 

The aperture through which the work of creative and talented people emerges.

So, Paul, what contributions to human endeavour have come out of your brainus this morning?

brainus by Tiahlm September 26, 2007

Brainus 

noun - the pseudo-brain you have in your anus, that you inadvertently use to make stupid decisions or make you say stupid things, as opposed to using your actual brain. (2)Name used to describe someone who used his/ass and therefore "brainus" to make a decision that was stupid.

That's using your brainus... idiot!
Nice work on that one brainus.

Brainus by Jonathan Ainslie August 13, 2006

Brainus 

The occurence of putting one person's testicle(s) inside another person's anus.

He gave her the brainus.

Brainus by Roddy von Seldeneck May 19, 2007

Brainus 

Combining words brain and anus.
aka...having your head up your butt.

Honestly, I really do not know how I came up with that figure, must have been using my brainus that day.

Brainus by Motosaki410 June 5, 2019