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One who goes to extremes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. a thorough or thoroughgoing person or thing
2. a person or thing that is excellent of its kind
3. an extremist
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||out-and-outer - someone who is excellent at something|
jargon, lingo, patois, argot, vernacular, slang, cant - a characteristic language of a particular group (as among thieves); "they don't speak our lingo"
expert - a person with special knowledge or ability who performs skillfully
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.