The definition of a frenemy is someone who is both a friend and an enemy.noun
An example of a frenemy is someone who you are nice to in person, but secretly compete with.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. fren·e·mies Informal
A person who is ostensibly friendly or collegial with someone but who is actually antagonistic or competitive.
Origin: Blend of fr(iend) + enemy.