A shooter can be:

• Rock group formed in Sydney in 1979. Played live all over Sydney as well as tours to Canberra and Melbourne.
• A type of video game. See shoot 'em up or shooter game.
• One of several types of alcoholic beverages intended to be drunk as "a shot" (a measure of volume approximately equal to one ounce).
• A 1988 made-for-TV movie. See Shooter (movie).
• a book by USMC Sgt. Jack Coughlin about his experiences as a sniper in Iraq.
• A slang term for a firearm, especially a handgun.
• In marbles, a marble of 3/4" diameter, propelled by a player to strike another marble.
• A person who takes part in the sport or act of shooting.
• A pro wrestler deviating from the script, see Shoot (professional wrestling)