Also found in: Idioms.
Related to preppily: preppy
prep·pyor prep·pie (prĕp′ē)Informal
n. pl. prep·pies
1. A student or former student of a preparatory school.
2. A person whose manner and dress are deemed typical of traditional preparatory schools.
adj. prep·pi·er, prep·pi·est
Of or relating to a preppy or a preparatory school.
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.
informal in a preppy manner
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014