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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
Related Words

Brainkush 

A sudden epiphany involving a realization about everyday life that seems life altering but is then forgotten by the short term memory loss caused by Marijuana use.
"Cheese melts faster on bread because of it's porous texture" = Brainkush
Brainkush by Broe February 15, 2008

brainbuster 

the opponent is set up for the suplex but is reversed and is slammed underneath the attacker's arm, crushing the head/upper back
brainbuster hit! ouch
brainbuster by tony December 29, 2003
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
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
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