a chance shot taken casually, hastily, or without careful aim
2.
a shot fired to kill game in disregard of the rules of sport
3.
a shot fired at quarry within easy range, often from an ambush
Word Origin and History for pot shot
potshot
n.
also pot-shot, 1836, "shot taken at animal simply to 'get it in the pot,' not for sport or marksmanship;" from pot (n.1) + shot (n.). Extended sense of "opportunistic criticism" first recorded 1926. Cf. pot-hunter "one who shoots whatever he finds; one who kills for food not for sport."