Of dubious character or honesty; questionable. See Synonyms at dark.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "shady" in a sentence
"Over the years, Bud Billings had some -- well, I mean, I ` ll use the term shady, maybe operating on the fringe of legality, with the used car business, pawnshops, running strip joints, that sort of thing."
"I wear my seatbelt, don't smoke, eat healthy, use a water filter and carry a dummy wallet with fake credit cards and funny money whenever I'm in "shady" areas and hope I get pick pocketed."
"It is not uncommon for certain shady dealing to go on for years, with a small group of critics but never really breaking out into the media."