Someone who is so stupid, or who seems to get more idiotic every day that you swear they pick out parts of their brain every time they pick their nose.
How can that booger brain not remember what I told her 5 seconds ago? She must have picked out part of her frontal lobe from her damn nose this time.
by Johnny Ock November 6, 2006
Noun. 1) A metaphor for a thought of any manner of consequence; that which sometimes results from "picking the brain."
I just had a brain booger; by virtue of its name, Brainbooger.com must be a receptacle of all manner of thoughts!
by Yu Phlung Pu June 11, 2009
when you have someone inside your brain that sneezes, your brain and size of head expand backwards in a way that you start looking like a pumpking head.
by space trip January 30, 2018