a gunfight that must end in defeat for one side or the other, as between gunfighters in the Old West, criminal groups, or law-enforcement officers and criminals.
Slang. any military conflict or skirmish.
Slang. a high-scoring or intensely played game or tournament, as of basketball or ice hockey.
Soccer. a method of breaking a tie score at the end of overtime in which five players from each team alternate shooting at the opponent's goal, starting from a spot 35 yards (39 meters) from the goal line, in an attempt to kick the ball past the rival goalkeeper in under five seconds.
1945-50; noun use of verb phrase shoot (it) out to settle a dispute with firearms