by Poom November 07, 2004
A person with a brain as empty as a bubble. Both girls and guys can be bubble brains, but it often refers to a girl. A bubble brain may not remember what you say minutes after you have spoken. If she is thinking at all she is thinking about herself.
To be only slightly smarter than Paris Hilton. A bubble brain may still be a good time in bed and scream from pleasure really loudly. She is a bubble brain but her body is hot.
by Roberta Capelovitch May 28, 2007
I've been having brain farts so often this past week, its starting to feel like brain diarrhea...
This brain diarrhea is really affecting my semester's grade.
This brain diarrhea is really affecting my semester's grade.
by David Fate February 06, 2009
The phenomenon known to mothers where their brains become useless piles of goo after being around their children for too long.
by LisaS December 09, 2007
The penis (as opposed to the upper, real brain, which is located in your skull). Used as a metaphor for male sexual urges. "Thinking with your lower brain" is the act of discarding all logic and sense (apparently the job of the upper brain) in order to gain the affection of/have sex with the opposite sex.
Horatio: Sure, Clarissa, I'll go skinny-dipping in highly-concentrated sulphuric acid with you this weekend.
Algernon: Stop thinking with your lower brain, Horatio.
Algernon: Stop thinking with your lower brain, Horatio.
by Nobodyiscalledhoratio January 25, 2006
by Henry Harmison July 14, 2008
He answered much more difficult trivia questions, but when asked the answer to 9 squared, he had a brain glitch.
by Raoul_16 November 14, 2007