Timmy tried to define 'brain orgasim'... he didn't know he spelled it incorrectly. Ironic because it has the word Brain in it, inferring thought and logic.
by ClickerMonkey July 21, 2010
When you aren't feeling it "down there", but your brain(and nervous system) is jstu so overloaded with feeling(usally about a person).
girl one: omg..look at the hot guy!
girl 2: yah..thats michael!
girl 3: wow...omgomgogm! brain ORGASIM!
girl 2: yah..thats michael!
girl 3: wow...omgomgogm! brain ORGASIM!
by THE evil bagel May 29, 2005