wheel·er-deal·er (w??l?r-d??l?r, hw??-)n. Informal One who advances one’s own interests by canny, aggressive, or unscrupulous behavior.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.wheeler-dealer n informal a person who wheels and deals Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014wheel?er-deal?er or wheel?er and deal?er, n. a clever or crafty person who devises intricate, highly profitable schemes and transactions, as in business or politics. [1950?55] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.