n. the littlest finger on either hand. : Ouch! I smashed my pinky.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
pinkie
"the little finger," 1808, in Scottish, from Du. pinkje, dim. of pink "little finger," of uncertain origin.