1. a person who appears to be a friend but whose actions or words suggest they are actually an enemy or rival
Usage: informal; often used in social contexts to describe someone who is outwardly friendly but behaves in a hostile or competitive manner

Examples

• She smiled and complimented my work, but I knew she was a frenemy who wanted my promotion.
• My coworker acts friendly in meetings but spreads rumors about me—a classic frenemy.
• I finally unfollowed my frenemy on social media because her passive-aggressive comments were exhausting.
• He's been my frenemy since college; we hang out, but he's always trying to one-up me.
• Frenemies are harder to deal with than outright enemies because you never know where you stand with them.
• She invited me to her party, but I suspect she's just a frenemy looking to gather gossip.