1858, "shot taken at animal simply to kill for food," in other words, to get it in the pot, not for sporting or marksmanship. Extended sense of "opportunistic criticism" first recorded 1926.
n. a sharp criticism; a wild shot of criticism. (Usually with take.) : Please stop taking potshots at me!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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