look up any word, like dirty sanchez:
 
1.
Any intellectual/academic discussion meant more to show off the intelligence of the speaker than to prove a point or educate anyone listening.
Freudian literary criticism is pretty useless, to be honest; eventually they stop talking about literature entirely, in favor of pointless brainwanking.
by kiefda03 June 08, 2010
 
2.
Act of spending one's time with very complicated theoretical problems which, when solved, do not serve for anything useful or practical.
J: Did you understand the sense of the problem in theoretical quantum mechanics which we solved in our course today?
P: It was just some brain-wanking. It does not have any practical meaning.
by xxteapot November 30, 2011