Standard Operating Procedure; Standing Operating Procedure.
Also, S.O.P.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sop (sɒp)
1.  (often plural) food soaked in a liquid before being eaten
2.  a concession, bribe, etc, given to placate or mollify: a sop to one's feelings
3.  informal a stupid or weak person
vb (when intr, often foll by in) , sops, sopping, sopped
4.  (tr) to dip or soak (food) in liquid
5.  to soak or be soaked
[Old English sopp; related to Old Norse soppasoup, Old High German sopfa milk with bread; see sup²]

abbreviation for
standard operating procedure

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. sopp- "bread soaked in some liquid," (in soppcuppe "cup into which sops are put"), from P.Gmc. *suppo, related to O.E. verb suppan (see sup (2)), probably reinforced by O.Fr. soupe (see soup (n.)). Meaning "something given to appease" is from
1665, an allusion to the sop given by the Sibyl to Cerberus in Virgil's "Aeneid."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
standard operating procedure
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Bible Dictionary

Sop definition

a morsel of bread (John 13:26; comp. Ruth 2:14). Our Lord took a piece of unleavened bread, and dipping it into the broth of bitter herbs at the Paschal meal, gave it to Judas. (Comp. Ruth 2:14.)

Easton's 1897 Bible Dictionary
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