Noun
The winning situation in a duel in which the first one to draw blood from the other wins.
The first damage or reverse inflicted on an opponent in a conflict.
(sports) The first score in a competition.
Source: en.wiktionary.orgDennehy played the sheriff in Washington state who doggedly pursues Vietnam veteran John Rambo (Sylvester Stallone) in First Blood (1982) and a district attorney who’s out to save his own skin in the Harrison Ford-starrer Presumed Innocent (1990). Source: Internet
The first scene was a combination of model shots and a set in Yuma, Arizona where Rambo: First Blood Part II had been filmed. Source: Internet