first blood noun3 •The first damage or reverse inflicted on an opponent in a conflict.Rambo - They drew first blood, not me. Trautman - Look Johnny, let me come in and get you the hell out of there! Rambo - They drew first blood... Trautman - Rambo, are you still reading me? Covey leader to Raven! Rambo! Acknowledge! http://www.imdb.com/title/tt0083944/quotes •The first score in a competition. •The condition in a duel in which the first one to draw blood from the other wins.