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adj. Informal
1. Intently and fiercely competitive, often unscrupulously so: a down-and-dirty political campaign.
2. Bawdy; lewd.
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.


adj. Informal.
1. unscrupulous; nasty: a down-and-dirty election campaign.
2. earthy; funky.
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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Army Special Forces veteran Larry Jordan was given a unique assignment by his commanders--come up with a truly down-and-dirty hand-to-hand fighting system for his fellow Green Berets and U.S.
20 show featured another wine-related dirty job: wine cave digger.) Merryvale winemaker Sean Foster said Rowe had a good time getting down-and-dirty at the winery, and mentioned that he always loves an excuse to come up to the wine country to film.
Raffish, rakish Cagliari, Sardinia's down-and-dirty port city, looks set to be catapulted onto the international trophy art museum circuit if Zaha Hadid's latest vision comes to pass.