noun; when one is extremely pumped from being near, hearing about, or actually being in a fight. It is characterized by shaking from the build up of adrenaline, and the need to do something reckless. (not an actual boner)
Nick got a massive fight boner when he heard that his room mate got a beer bottle smashed off his face, and a southern comfort bottle off the back of his head, but still beat the shit outta three doods.
by vweeenuh schnitzel November 23, 2010