Something that strikes a chord in someone's thinking, creating a obsession of "enlightenment" and stimulation in knowledge, and gets obsessed in his/her thought pattern until his / her thought/idea wears off or the thought gets put into action.
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 blue vain brain boner.
Peter: Yeah, it was so good it gave me a blue vain brain boner.
by Slim and Gee Production March 30, 2011