Origin of nitpick

First recorded in 1965–70; nit1 + pick1
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British Dictionary definitions for nit-pick

nit-pick

verb (intr)

informal to raise petty objections or concern oneself with insignificant details
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for nit-pick

nitpick

v.

"seek petty faults," also nit-pick, 1962, back-formation from earlier nitpicker. Related: Nitpicking; nitpicky.

Online Etymology Dictionary, © 2010 Douglas Harper