1 definition by nullswitch
Something that strikes a chord in someone's thinking, creating a spur of "enlightenment" and stimulation in knowledge, especially in subjects like philosophy & logic.
John: Hey, have you seen that recent philosophical discussion between XXX and YYY on YouTube?
Peter: Yeah, it was so good it gave me a brain boner.
Peter: Yeah, it was so good it gave me a brain boner.
by nullswitch February 20, 2011